Content Standards for Digital Geospatial Metadata
Federal Geographic Data Committee
June 8, 1994
Federal Geographic Data Committee
Established by Office of Management and Budget Circular A-16, the Federal
Geographic Data Committee (FGDC) promotes the coordinated development,
use, sharing, and dissemination of geographic data.
The FGDC is composed of representatives from the Departments of
Agriculture, Commerce, Defense, Energy, Housing and Urban Development,
the Interior, State, and Transportation; the Environmental Protection Agency;
the Federal Emergency Management Agency; the Library of Congress; the
National Aeronautics and Space Administration; the National Archives and
Records Administration; and the Tennessee Valley Authority. Additional
Federal agencies participate on FGDC subcommittees and working groups.
The Department of the Interior chairs the committee.
FGDC subcommittees work on issues related to data categories coordinated
under the circular. Subcommittees establish and implement standards for data
content, quality, and transfer; encourage the exchange of information and the
transfer of data; and organize the collection of geographic data to reduce
duplication of effort. Working groups are established for issues that transcend
data categories.
For more information about the committee, or to be added to the committee's
newsletter mailing list, please contact:
Federal Geographic Data Committee Secretariat
c/o U.S. Geological Survey
590 National Center
Reston, Virginia 22092
Telephone: (703) 648-5514
Facsimile: (703) 648-5755
Internet (electronic mail): gdc@usgs.gov
Anonymous FTP: fgdc.er.usgs.gov
The following is the recommended bibliographic citation for this publication:
Federal Geographic Data Committee. 1994. Content standards for
digital geospatial metadata (June 8). Federal Geographic Data Committee.
Washington, D.C.
Table of Contents
Overview
Organization of the Standard
0 Metadata
1 Identification Information
2 Data Quality Information
3 Spatial Data Organization Information
4 Spatial Reference Information
5 Entity and Attribute Information
6 Distribution Information
7 Metadata Reference Information
8 Citation Information
9 Time Period Information
10 Contact Information
Appendixes
A. Glossary
B. Alphabetical List of Compound Elements and Data Elements
C. References
1. Name of Standard. Content Standards for Digital Geospatial Metadata.
2. Explanation. This standard specifies the information content of metadata
for a set of digital geospatial data. The purpose of the standard is to provide a
common set of terminology and definitions for concepts related to these
metadata. Metadata are data about the content, quality, condition, and other
characteristics of data.
The Federal Geographic Data Committee (FGDC) initiated work on the
standard in June, 1992, through a forum on geospatial metadata. At the forum,
the participants agreed on the need for a standard on the information content of
metadata about geospatial data. The committee accepted the offer of ASTM
Section D18.01.05 to develop a draft information content standard. This draft
was slightly revised, and offered for public review from October 1992 to April
1993. Extensive comments were received from the public. The FGDC's
Standards Working Group revised the draft. The revised draft was provided for
further review and testing in July 1993. Refined drafts were offered for review
and testing in January and March 1994.
3. Approving Authority. The Federal Geographic Data Committee approved
the standard on June 8, 1994. The committee plans to submit the standard to
the Department of Commerce for approval as a Federal Information Processing
Standard.
4. Maintenance Authority. The current maintenance authority for the
standard is the FGDC Secretariat. Questions concerning the standard are to be
addressed to the FGDC Secretariat, in care of the U.S. Geological Survey, 590
National Center, Reston, Virginia 22092. The committee plans to designate an
organization other than the secretariat as the maintenance authority as part of
the process of submitting the standard for approval as a Federal Information
Processing Standard.
5. Related Documents. A list of references is contained in Appendix C.
6. Objectives. The objectives of the standard are to provide a common set of
terminology and definitions for the documentation of digital geospatial data.
The standard establishes the names of data elements and compound elements
(groups of data elements) to be used for these purposes, the definitions of these
compound elements and data elements, and information about the values that
are to be provided for the data elements.
The major uses of metadata are:
to maintain an organization's internal investment in geospatial data,
to provide information about an organization's data holdings to data
catalogues, clearinghouses, and brokerages, and
to provide information needed to process and interpret data to be
received through a transfer from an external source.
The information included in the standard was selected based on four roles that
metadata play:
availability -- data needed to determine the sets of data that exist for a
geographic location.
fitness for use -- data needed to determine if a set of data meets a
specific need.
access -- data needed to acquire an identified set of data.
transfer -- data needed to process and use a set of data.
These roles form a continuum in which a user cascades through a pyramid of
choices to determine what data are available, to evaluate the fitness of the data
for use, to access the data, and to transfer and process the data. The exact order
in which data elements are evaluated, and the relative importance of data
elements, will not be the same for all users.
7. Applicability. This standard is for the documentation of geospatial data.
Executive Order 12906, "Coordinating Geographic Data Acquisition and
Access: The National Spatial Data Infrastructure," was signed on April 11,
1994, by President William Clinton. Section 3, Development of a National
Geospatial Data Clearinghouse, paragraph (b) states: "Standardized
Documentation of Data. Beginning 9 months from the date of this order, each
agency shall document all new geospatial data it collects or produces, either
directly or indirectly, using the standard under development by the FGDC, and
make that standardized documentation electronically accessible to the
Clearinghouse network. Within 1 year of the date of this order, agencies shall
adopt a schedule, developed in consultation with the FGDC, for documenting,
to the extent practicable, geospatial data previously collected or produced,
either directly or indirectly, and making that data documentation electronically
accessible to the Clearinghouse network." This standard is the data
documentation standard referenced in the executive order.
In addition to use by the Federal Government, the FGDC invites and
encourages organizations and persons from State, local, and tribal
governments, the private sector, and non-profit organizations to use the
standard to document their geospatial data. A major difficulty in the geospatial
data community is the lack of information that helps prospective users to
determine what data exist, the fitness of existing data for planned applications,
and the conditions for accessing existing data, and to transfer data to a user's
system. This standard, developed with aid of broad public participation, will
help to ease these problems and to develop the National Spatial Data
Infrastructure.
The standard was developed from the perspective of defining the information
required by a prospective user to determine the availability of a set of geospatial
data, to determine the fitness the set of geospatial data for an intended use, to
determine the means of accessing the set of geospatial data, and to successfully
transfer the set of geospatial data. As such, the standard establishes the names
of data elements and compound elements to be used for these purposes, the
definitions of these data elements and compound elements, and information
about the values that are to be provided for the data elements. The standard
does not specify the means by which this information is organized in a
computer system or in a data transfer, nor the means by which this information
is transmitted, communicated, or presented to the user.
8. Specifications. The standard provides specifications for terminology of data
elements and compound elements, definitions for this terminology, and
information about values to be provided for the data elements. Information
about terms that are mandatory, mandatory under certain conditions, and
optional (provided at the discretion of the data provider) is provided by the
standard.
9. Where to Obtain Copies. Copies of this publication are available from the
Federal Geographic Data Committee Secretariat, in care of the U.S. Geological
Survey, 590 National Center, Reston, Virginia 22092; telephone (703) 648-
5514; facsimile (703) 648-5755; Internet (electronic mail) gdc@usgs.gov. The
text also is available from anonymous File Transfer Protocol (anonymous FTP)
server fgdc.er.usgs.gov.
Numbered Sections
The standard is organized in a hierarchy of data elements and compound
elements that define the information content for metadata to document a set of
digital geospatial data. The starting point is "metadata" (section 0). The
compound element "metadata" is composed of other compound elements
representing different concepts about the data set. Each of these compound
elements has a numbered section in the standard. In each numbered section,
these compound elements are defined by other compound elements and data
elements. The section "contact information" is a special section that specifies
the data elements for contacting individuals and organizations. This section is
used by other sections, and is defined once for convenience.
Each section begins with the name and definition of the compound element that
defines the section. The name and definition are followed by production rules
(see below) that define this compound element in terms of data elements, either
directly or by the use of intermediate compound elements. When intermediate
compound elements are used, the production rules for these elements also are
provided in this part of the section.
The production rules are followed by a list of names and definitions of
compound elements and data elements used in the section.
Compound Elements
A compound element is a group of data elements and other compound
elements. All compound elements are described by data elements, either
directly or through intermediate compound elements. Compound elements
represent higher-level concepts that cannot be represented by individual data
elements. The form for the definition of compound elements is:
Compound element name -- definition.
Type: compound
The type of "compound" uniquely identifies the compound elements in the lists
of terms and definitions.
Production Rules
A production rule specifies the relationship between a compound element, and
data elements and other (lower-level) compound elements. Each production
rule has a left side (identifier) and a right side (expression) connected by the
symbol "=", meaning that the term on the left side is replaced by or produces
the term on the right side. Terms on the right side are either other compound
elements or individual data elements. By making substitutions using matching
terms in the production rules, one can explain higher-level concepts using data
elements.
The symbols used in the production rules have the following meaning:
Symbol Meaning
= is replaced by, produces, consists of
+ and
[|] selection - select one term from the list of enclosed
terms (exclusive or). Terms are separated by "|".
m{}n iteration - the term(s) enclosed is(are) repeated from
"m" to "n" times
() optional - the term(s) enclosed is(are) optional
Examples:
a = b + c "a consists of b and c"
a = [b | c] "a consists of one of b or c"
a = 4{b}6 "a consists of four to six occurrences of b"
a = b + (c) "a consists of b and optionally c"
Interpreting the production rules:
The terms bounded by parentheses, "(" and ")", are optional and are
provided at the discretion of the data producer. If a producer chooses
to provide information enclosed by parentheses, the producer shall
follow the production rules for the enclosed information. For example,
if the producer decides to provide the optional information described
in the term:
(a + b + c)
the producer shall provide a and b and c.
Only for terms bounded by parentheses does the producer have the
discretion of deciding whether or not to provide the information.
The variation among the ways in which geospatial data are produced
and distributed, the fact that all geospatial data do not have the same
characteristics, and the issue that all details of data sets that are in
work or are planned may not be decided, caused the need to express
the concept of "mandatory if applicable." This concept means that if
the data set exhibits (or, for data sets that are in work or planned, it is
known that the data set will exhibit) a defined characteristic, then the
producer shall provide the information needed to describe that
characteristic. This concept is described by the production rule:
0{ term }1
Data Elements
A data element is a logically primitive item of data. The entry for a data
elements includes the name of the data element, the definition of the data
element, a description of the values that can be assigned to the data element.
The form for the definition of the data elements is:
Data element name -- definition.
Type:
Domain:
The information about the values for the data elements include a description of
the type of the value, and a description of the domain of the valid values. The
type of the data element describes the kind of value to be provided. The choices
are "integer" for integer numbers, "real" for real numbers, "text" for ASCII
characters, "date" for day of the year, and "time" for time of the day.
The domain describes valid values that can be assigned to the data element.
The domain may specify a list of valid values, references to lists of valid values,
or restrictions on the range of values that can be assigned to a data element.
The domain also may note that the domain is free from restrictions, and any
values that can be represented by the "type" of the data element can be
assigned. These unrestricted domains are represented by the use of the word
"free" followed by the type of the data element (that is, free text, free date, free
real, free time, free integer).
Some domains can be partly, but not completely, specified. For example, there
are several widely used data transfer formats, but there may be many more that
are less well known. To allow a producer to describe its data in these
circumstances, the convention of providing a list of values followed by the
designation of a "free" domain was used. In these cases, assignments of values
shall be made from the provided domain when possible. When not possible,
providers may create and assign their own value. A created value shall not
redefine a value provided by the standard.
Another issue is the representation of null values (representing such concepts as
"unknown") in the domain. While this is relatively simple for textual entries
(one would enter the text "Unknown"), it is not as simple for the integer, real,
date, and time types (for example, which integer value means "unknown"?).
Because conventions for providing this information vary among
implementations, the standard specifies what concepts shall be represented, but
does not mandate a means for representing them.
In addition to the values to be represented, the form of the representation also is
important, especially to applications that will manipulate the data elements.
The following conventions for forms of values for data elements shall be used:
Calendar Dates (Years, Months, and Days)
A.D. Era to December 31, 9999 A.D. -- Values for day and month of
year, and for years, shall follow the calendar date convention (general
forms of YYYY for years; YYYYMM for month of a year (with
month being expressed as an integer), and YYYYMMDD for a day of
the year) specified in American National Standards Institute, 1986,
Representation for calendar date and ordinal date for information
interchange (ANSI X3.30-1985): New York, American National
Standards Institute (adopted as Federal Information Processing
Standard 4-1).
B.C. Era to 9999 B.C. -- Values for day and month of year, and for
years, shall follow the calendar date convention, preceded by the lower
case letters "bc" (general forms of bcYYYY for years; bcYYYYMM
for month of a year (with month being expressed as an integer), and
bcYYYYMMDD for a day of the year).
B.C. Era before 9999 B.C. -- Values for the year shall consist of as
many numeric characters as are needed to represent the number of the
year B.C., preceded by the lower case letters "cc" (general form of
ccYYYYYYY...).
A.D. Era after 9999 A.D. -- Values for the year shall consist of as
many numeric characters as are needed to represent the number of the
year A.D., preceded by the lower case letters "cd" (general form of
cdYYYYYYY...).
Time of Day (Hours, Minutes, and Seconds)
Because some geospatial data and related applications are sensitive to
time of day information, three conventions are permitted. Only one
convention shall be used for metadata for a data set. The conventions
are:
- Local Time. For producers who wish to record time in
local time, values shall follow the 24-hour timekeeping
system for local time of day in the hours, minutes,
seconds, and decimal fractions of a second (to the
precision desired) without separators convention
(general form of HHMMSSSS) specified in American
National Standards Institute, 1986, Representations of
local time of day for information interchange (ANSI
X3.43-1986): New York, American National Standards
Institute (adopted as Federal Information Processing
Standard 58-1).
- Local Time with Time Differential Factor. For
producers who wish to record time in local time and the
relationship to Universal Time (Greenwich Mean Time),
values shall follow the 24-hour timekeeping system for
local time of day in hours, minutes, seconds, and
decimal fractions of a second (to the resolution desired)
without separators convention. This value shall be
followed, without separators, by the time differential
factor. The time differential factor expresses the
difference in hours and minutes between local time and
Universal Time. It is represented by a four-digit number
preceded by a plus sign (+) or minus sign (-), indicating
the hours and minutes the local time is ahead of or
behind Universal Time, respectively. The general form
is HHMMSSSSshhmm, where HHMMSSSS is the local
time using 24-hour timekeeping (expressed to the
precision desired), 's' is the plus or minus sign for the
time differential factor, and hhmm is the time
differential factor. (This option allows producers to
record local time and time zone information. For
example, Eastern Standard Time has a time differential
factor of -0500, Central Standard Time has a time
differential factor of -0600, Eastern Daylight Time has a
time differential factor of -0400, and Central Daylight
Time has a time differential factor of -0500.) This
option is specified in American National Standards
Institute, 1975, Representations of universal time, local
time differentials, and United States time zone reference
for information interchange (ANSI X3.51-1975): New
York, American National Standards Institute (adopted
as Federal Information Processing Standard 59).
- Universal Time (Greenwich Mean Time). For producers
who wish to record time in Universal Time (Greenwich
Mean Time), values shall follow the 24-hour
timekeeping system for Universal Time of day in hours,
minutes, seconds, and decimal fractions of a second
(expressed to the precision desired) without separators
convention, with the upper case letter "Z" directly
following the low-order (or extreme right hand) time
element of the 24-hour clock time expression. The
general form is HHMMSSSSZ, where HHMMSSSS is
Universal Time using 24-hour timekeeping, and Z is the
letter "Z". This option is specified in American
National Standards Institute, 1975, Representations of
universal time, local time differentials, and United
States time zone reference for information interchange
(ANSI X3.51-1975): New York, American National
Standards Institute (adopted as Federal Information
Processing Standard 59).
Latitude and Longitude
Values for latitude and longitude shall be expressed as decimal
fractions of degrees. Whole degrees of latitude shall be represented by
a two-digit decimal number ranging from 0 through 90. Whole
degrees of longitude shall be represented by a three-digit decimal
number ranging from 0 through 180. When a decimal fraction of a
degree is specified, it shall be separated from the whole number of
degrees by a decimal point. Decimal fractions of a degree may be
expressed to the precision desired.
- Latitudes north of the equator shall be specified by a
plus sign (+), or by the absence of a minus sign (-),
preceding the two digits designating degrees. Latitudes
south of the Equator shall be designated by a minus sign
(-) preceding the two digits designating degrees. A
point on the Equator shall be assigned to the Northern
Hemisphere.
- Longitudes east of the prime meridian shall be specified
by a plus sign (+), or by the absence of a minus sign (-),
preceding the three digits designating degrees of
longitude. Longitudes west of the meridian shall be
designated by minus sign (-) preceding the three digits
designating degrees. A point on the prime meridian
shall be assigned to the Eastern Hemisphere. A point on
the 180th meridian shall be assigned to the Western
Hemisphere. One exception to this last convention is
permitted. For the special condition of describing a
band of latitude around the earth, the East Bounding
Coordinate data element shall be assigned the value
+180 (180) degrees.
- Any spatial address with a latitude of +90 (90) or -90
degrees will specify the position at the North or South
Pole, respectively. The component for longitude may
have any legal value.
With the exception of the special condition described above, this form
is specified in Department of Commerce, 1986, Representation of
geographic point locations for information interchange (Federal
Information Processing Standard 70-1): Washington, Department of
Commerce, National Institute of Standards and Technology.
Network Addresses and File Names
values for file names, network addresses for computer systems, and
related services should follow the Uniform Resource Locator
convention of the Internet when possible. See
http://www.ncsa.uiuc.edu/demoweb/url-primer.html for additional
details about the Uniform Resource Locator.
0 Metadata -- data about the content, quality, condition, and
other characteristics of data.
Type: compound
Metadata =
Identification_Information +
0{Data_Quality_Information}1 +
0{Spatial_Data_Organization_Information}1 +
0{Spatial_Reference_Information}1 +
0{Entity_and_Attribute_Information}1 +
0{Distribution_Information}1 +
Metadata_Reference_Information
(Sections 1 through 7 define the terms on the right side of the production rule.)
1 Identification Information -- basic information about the
data set.
Type: compound
Identification_Information =
Citation +
Description +
Time_Period_of_Content +
Status +
Spatial_Domain +
Keywords +
Access_Constraints +
Use_Constraints +
(Point_of_Contact) +
(1{Browse_Graphic}n) +
(Data_Set_Credit) +
(Security_Information) +
(Native_Data_Set_Environment) +
(1{Cross_Reference}n)
Citation =
Citation_Information (see section 8 for
production rules)
Description =
Abstract +
Purpose +
(Supplemental_Information)
Time_Period_of_Content =
Time_Period_Information (see section 9 for
production rules) +
Currentness_Reference
Status =
Progress +
Maintenance_and_Update_Frequency
Spatial_Domain =
Bounding_Coordinates +
(1{Data_Set_G-Polygon}n)
Bounding_Coordinates =
West_Bounding_Coordinate +
East_Bounding_Coordinate +
North_Bounding_Coordinate +
South_Bounding_Coordinate
Data_Set_G-Polygon =
Data_Set_G-Polygon_Outer_G-Ring +
0{Data_Set_G-Polygon_Exclusion_G-
Ring}n
Data_Set_G-Polygon_Outer_G-Ring =
4{G-Ring_Latitude +
G-Ring_Longitude}n
Data_Set_G-Polygon_Exclusion_G-Ring =
4{G-Ring_Latitude +
G-Ring_Longitude}n
Keywords =
Theme +
(Place) +
(Stratum) +
(Temporal)
Theme =
1{Theme_Keyword_Thesaurus +
1{Theme_Keyword}n }n
Place =
1{Place_Keyword_Thesaurus +
1{Place_Keyword}n }n
Stratum =
1{Stratum_Keyword_Thesaurus +
1{Stratum_Keyword}n }n
Temporal =
1{Temporal_Keyword_Thesaurus +
1{Temporal_Keyword}n }n
Point_of_Contact =
Contact_Information (see section 10 for production rules)
Browse_Graphic =
Browse_Graphic_File_Name +
Browse_Graphic_File_Description +
Browse_Graphic_File_Type
Security_Information =
Security_Classification_System +
Security_Classification +
Security_Handling_Description
Cross_Reference =
Citation_Information (see section 8 for
production rules)
.1 Citation -- information to be used to reference the
data set.
Type: compound
.2 Description -- a characterization of the data set,
including its intended use and limitations.
Type: compound
.1 Abstract -- a brief narrative summary
of the data set.
Type: text
Domain: free text
.2 Purpose -- a summary of the
intentions with which the data set was developed.
Type: text
Domain: free text
.3 Supplemental Information -- other
descriptive information about the data set.
Type: text
Domain: free text
.3 Time Period of Content -- time period(s) for which
the data set corresponds to the ground.
Type: compound
.1 Currentness Reference -- the basis on
which the time period of content information is
determined.
Type: text
Domain: "ground condition"
"publication date" free text
.4 Status -- the state of and maintenance
information for the data set.
Type: compound
.1 Progress -- the state of the data set.
Type: text
Domain: "Complete" "In work"
"Planned"
.2 Maintenance and Update Frequency
-- the frequency with which changes and
additions are made to the data set after the initial
data set is completed.
Type: text
Domain: "Continually" "Daily"
"Weekly" "Monthly"
"Annually" "Unknown" "As
needed" "Irregular" "None
planned" free text
.5 Spatial Domain - the geographic areal domain of
the data set.
Type: compound
.1 Bounding Coordinates - the limits of
coverage of a data set expressed by latitude and
longitude values in the order western-most,
eastern-most, northern-most, and southern-most.
For data sets that include a complete band of
latitude around the earth, the West Bounding
Coordinate shall be assigned the value -180.0,
and the East Bounding Coordinate shall be
assigned the value 180.0
Type: compound
.1 West Bounding
Coordinate -- western-most coordinate of
the limit of coverage expressed in
longitude.
Type: real
Domain: -180.0 <= West
Bounding Coordinate <
180.0
.2 East Bounding
Coordinate -- eastern-most coordinate of
the limit of coverage expressed in
longitude.
Type: real
Domain: -180.0 <= East Bounding
Coordinate <= 180.0
.3 North Bounding
Coordinate -- northern-most coordinate of
the limit of coverage expressed in latitude.
Type: real
Domain: -90.0 <= North
Bounding Coordinate <=
90.0;
North Bounding Coordin
ate >=
South Bounding Coordin
ate
.4 South Bounding
Coordinate -- southern-most coordinate of
the limit of coverage expressed in latitude.
Type: real
Domain: -90.0 <= South
Bounding Coordinate <=
90.0;
South Bounding Coordin
ate <=
North Bounding Coordin
ate
.2 Data Set G-Polygon -- coordinates
defining the outline of an area covered by a data
set.
Type: compound
.1 Data Set G-Polygon Outer G-
Ring -- the closed nonintersecting
boundary of an interior area.
Type:
compound
.1 G-Ring
Latitude -- the latitude of a point of
the g-ring.
Type: real
Domain: -90.0 <= G-Ring
Latitude <= 90.0
.2 G-Ring
Longitude -- the longitude of a point
of the g-ring.
Type: real
Domain: -180.0 <= G-Ring
Longitude < 180.0
.2 Data Set G-Polygon Exclusion
G-Ring -- the closed nonintersecting
boundary of a void area (or "hole") in an
interior area.
Type: compound
.6 Keywords -- words or phrases summarizing an
aspect of the data set.
Type: compound
.1 Theme -- subjects covered by the data
set (for a list of some commonly-used thesauri,
see Part IV: Subject/index term sources in
Network Development and MARC Standards
Office, 1988, USMARC code list for relators,
sources, and description conventions:
Washington, Library of Congress).
Type: compound
.1 Theme Keyword
Thesaurus -- reference to a formally
registered thesaurus or a similar
authoritative source of theme keywords.
Type: text
Domain: "None" free text
.2 Theme Keyword --
common-use word or phrase used to
describe the subject of the data set.
Type: text
Domain: free text
.2 Place -- geographic locations
characterized by the data set.
Type: compound
.1 Place Keyword
Thesaurus -- reference to a formally
registered thesaurus or a similar
authoritative source of place keywords.
Type: text
Domain: "None" "Geographic
Names Information
System" free text
.2 Place Keyword -- the
geographic name of a location covered by a
data set.
Type: text
Domain: free text
.3 Stratum -- layered, vertical locations
characterized by the data set.
Type: compound
.1 Stratum Keyword
Thesaurus -- reference to a formally
registered thesaurus or a similar
authoritative source of stratum keywords.
Type: text
Domain: "None" free text
.2 Stratum Keyword -- the name
of a vertical location used to describe the
locations covered by a data set.
Type: text
Domain: free text
.4 Temporal -- time period(s)
characterized by the data set.
Type: compound
.1 Temporal Keyword
Thesaurus -- reference to a formally
registered thesaurus or a similar
authoritative source of temporal keywords.
Type: text
Domain: "None" free text
.2 Temporal Keyword -- the name
of a time period covered by a data set.
Type: text
Domain: free text
.7 Access Constraints -- restrictions and legal
prerequisites for accessing the data set. These include
any access constraints applied to assure the protection
of privacy or intellectual property, and any special
restrictions or limitations on obtaining the data set.
Type: text
Domain: "None" free text
.8 Use Constraints -- restrictions and legal
prerequisites for using the data set after access is
granted. These include any access constraints applied
to assure the protection of privacy or intellectual
property, and any special restrictions or limitations on
obtaining the data set.
Type: text
Domain: "None" free text
.9 Point of Contact -- contact information for an
individual or organization that is knowledgeable about
the data set.
Type: compound
.10 Browse Graphic -- a graphic that provides an
illustration of the data set. The graphic should include
a legend for interpreting the graphic.
Type: compound
.1 Browse Graphic File Name -- name of a
related graphic file that provides an illustration
of the data set.
Type: text
Domain: free text
.2 Browse Graphic File Description -- a
text description of the illustration.
Type: text
Domain: free text
.3 Browse Graphic File Type -- graphic
file type of a related graphic file.
Type: text
Domain: domain values in the table
below; free text
Domain
Value Definition
"CGM" Computer
Graphics Metafile
"EPS" Encapsulated
Postscript format
"GIF" Graphic
Interchange Format
"JPEG" Joint Photographic
Experts Group
format
"PBM" Portable Bit Map
format
"PS" Postscript format
"TIFF" Tagged Image File
Format
"XWD" X-Windows Dump
.11 Data Set Credit -- recognition of those who
contributed to the data set.
Type: text
Domain: free text
.12 Security Information -- handling restrictions
imposed on the data set because of national security,
privacy, or other concerns.
Type: compound
.1 Security Classification System -- name of
the classification system.
Type: text
Domain: free text
.2 Security Classification -- name of the
handling restrictions on the data set.
Type: text
Domain: "Top secret" "Secret"
"Confidential" "Restricted"
"Unclassified" "Sensitive" free
text
.3 Security Handling Description -- additional
information about the restrictions on handling
the data set.
Type: text
Domain: free text
.13 Native Data Set Environment -- a description of
the data set in the producer's processing environment,
including items such as the name of the software
(including version), the computer operating system, file
name (including host-, path-, and filenames), and the
data set size.
Type: text
Domain: free text
.14 Cross Reference -- information about other,
related data sets that are likely to be of interest.
Type: compound
2 Data Quality Information -- a general assessment of the
quality of the data set. (Recommendations on information to
be reported and tests to be performed are found in "Spatial
Data Quality," which is chapter 3 of part 1 in Department of
Commerce, 1992, Spatial Data Transfer Standard (SDTS)
(Federal Information Processing Standard 173):
Washington, Department of Commerce, National Institute of
Standards and Technology.)
Type: compound
Data_Quality_Information =
0{Attribute_Accuracy}1 +
Logical_Consistency_Report +
Completeness_Report +
0{Positional_Accuracy}1 +
Lineage +
(Cloud_Cover)
Attribute_Accuracy =
Attribute_Accuracy_Report +
(1{Quantitative_Attribute_Accuracy_Assessment}n)
Quantitative_Attribute_Accuracy_Assessment =
Attribute_Accuracy_Value +
Attribute_Accuracy_Explanation
Positional_Accuracy =
0{Horizontal_Positional_Accuracy}1 +
0{Vertical_Positional_Accuracy}1
Horizontal_Positional_Accuracy =
Horizontal_Positional_Accuracy_Report +
(1{Quantitative_Horizontal_Positional_Accuracy_Assessment}n)
Quantitative_Horizontal_Positional_Accuracy_Assessment =
Horizontal_Positional_Accuracy_Value +
Horizontal_Positional_Accuracy_Explanation
Vertical_Positional_Accuracy =
Vertical_Positional_Accuracy_Report +
(1{Quantitative_Vertical_Positional_Accuracy_Assessment}n)
Quantitative_Vertical_Positional_Accuracy_Assessment =
Vertical_Positional_Accuracy_Value +
Vertical_Positional_Accuracy_Explanation
Lineage =
0{Source_Information}n +
1{Process_Step}n
Source_Information =
Source_Citation +
0{Source_Scale_Denominator}1 +
Type_of_Source_Media +
Source_Time_Period_of_Content +
Source_Citation_Abbreviation +
Source_Contribution
Source_Citation =
Citation_Information (see section 8 for
production rules)
Source_Time_Period_of_Content =
Time_Period_Information (see section 9 for
production rules) +
Source_Currentness_Reference
Process_Step =
Process_Description +
0{Source_Used_Citation_Abbreviation}n +
Process_Date +
(Process_Time) +
0{Source_Produced_Citation_Abbreviation}n +
(Process_Contact)
Process_Contact =
Contact_Information (see section 10 for production rules)
.1 Attribute Accuracy -- an assessment of the accuracy
of the identification of entities and assignment of
attribute values in the data set.
Type: compound
.1 Attribute Accuracy Report -- an
explanation of the accuracy of the identification
of the entities and assignments of values in the
data set and a description of the tests used.
Type: text
Domain: free text
.2 Quantitative Attribute Accuracy
Assessment -- a value assigned to summarize the
accuracy of the identification of the entities and
assignments of values in the data set and the
identification of the test that yielded the value.
Type: compound
.1 Attribute Accuracy Value -- an estimate
of the accuracy of the identification of the
entities and assignments of attribute values
in the data set.
Type: text
Domain: "Unknown" free text
.2 Attribute Accuracy Explanation --
the identification of the test that yielded the
Attribute Accuracy Value.
Type: text
Domain: free text
.2 Logical Consistency Report -- an explanation of
the fidelity of the relationships in the data set and the
tests used.
Type: text
Domain: free text
.3 Completeness Report -- information about omissions,
selection criteria, generalization, definitions used, and
other rules used to derive the data set.
Type: text
Domain: free text
.4 Positional Accuracy -- an assessment of the
accuracy of the positions of spatial objects.
Type: compound
.1 Horizontal Positional Accuracy -- an
estimate of accuracy of the horizontal positions of
the spatial objects.
Type: compound
.1 Horizontal Positional
Accuracy Report -- an explanation of the
accuracy of the horizontal coordinate
measurements and a description of the tests
used.
Type: text
Domain: free text
.2 Quantitative Horizontal
Positional Accuracy Assessment -- numeric
value assigned to summarize the accuracy
of the horizontal coordinate measurements
and the identification of the test that
yielded the value.
Type: compound
.1 Horizontal
Positional Accuracy Value -- an
estimate of the accuracy of the
horizontal coordinate measurements
in the data set expressed in (ground)
meters.
Type: real
Domain: free real
.2 Horizontal
Positional Accuracy Explanation --
the identification of the test that
yielded the Horizontal Positional
Accuracy Value.
Type: text
Domain: free text
.2 Vertical Positional Accuracy -- an
estimate of accuracy of the vertical positions in
the data set.
Type: compound
.1 Vertical Positional
Accuracy Report -- an explanation of the
accuracy of the vertical coordinate
measurements and a description of the tests
used.
Type: text
Domain: free text
.2 Quantitative Vertical
Positional Accuracy Assessment -- numeric
value assigned to summarize the accuracy
of vertical coordinate measurements and
the identification of the test that yielded the
value.
Type: compound
.1 Vertical
Positional Accuracy Value -- an
estimate of the accuracy of the
vertical coordinate measurement in
the data set expressed in (ground)
meters.
Type: real
Domain: free real
.2 Vertical
Positional Accuracy Explanation --
the identification of the test that
yielded the Vertical Positional
Accuracy Value.
Type: text
Domain: free text
.5 Lineage -- information about the events,
parameters, and source data which constructed the data
set, and information about the responsible parties.
Type: compound
.1 Source Information -- list of sources
and a short discussion of the information
contributed by each.
Type: compound
.1 Source Citation -- reference for a source
data set.
Type: compound
.2 Source Scale
Denominator -- the denominator of the
representative fraction on a map (for
example, on a 1:24,000-scale map, the
Source Scale Denominator is 24000).
Type: integer
Domain: Source Scale
Denominator > 1
.3 Type of Source Media --
the medium of the source data set.
Type: text
Domain: "paper" "stable-base
material" "microfiche"
"microfilm"
"audiocassette" "chart"
"filmstrip"
"transparency"
"videocassette"
"videodisc" "videotape"
"physical model"
"computer program"
"disc" "cartridge tape"
"magnetic tape" "online"
"CD-ROM"
"electronic bulletin board
" "electronic mail
system" free text
.4 Source Time Period of
Content -- time period(s) for which the
source data set corresponds to the ground.
Type: compound
.1 Source
Currentness Reference -- the basis on
which the source time period of
content information of the source
data set is determined.
Type: text
Domain: "ground condition"
"publication date"
free text
.5 Source Citation
Abbreviation -- short-form alias for the
source citation.
Type: text
Domain: free text
.6 Source Contribution --
brief statement identifying the information
contributed by the source to the data set.
Type: text
Domain: free text
.2 Process Step -- information about a
single event.
Type: compound
.1 Process Description -- an
explanation of the event and related
parameters or tolerances.
Type: text
Domain: free text
.2 Source Used Citation
Abbreviation -- the Source Citation
Abbreviation of a data set used in the
processing step.
Type: text
Domain: Source Citation
Abbreviations from the
Source Information
entries for the data set.
.3 Process Date -- the date
when the event was completed.
Type: date
Domain: "Unknown" "Not
complete" free date
.4 Process Time -- the time
when the event was completed.
Type: time
Domain: free time
.5 Source Produced Citation
Abbreviation -- the Source Citation
Abbreviation of an intermediate data set
that (1) is significant in the opinion of the
data producer, (2) is generated in the
processing step, and (3) is used in later
processing steps.
Type: text
Domain: Source Citation
Abbreviations from the
Source Information
entries for the data set.
.6 Process Contact -- the
party responsible for the processing step
information.
Type: compound
.6 Cloud Cover -- area of a data set obstructed by
clouds, expressed as a percentage of the spatial extent.
Type: integer
Domain: 0 <= Cloud Cover <= 100
"Unknown"
3 Spatial Data Organization Information -- the mechanism
used to represent spatial information in the data set.
Type: compound
Spatial_Data_Organization_Information =
0{Indirect_Spatial_Reference}1 +
0{Direct_Spatial_Reference_Method +
(
[Point_and_Vector_Object_Information |
Raster_Object_Information] )}1
Point_and_Vector_Object_Information =
[SDTS_Terms_Description |
VPF_Terms_Description]
SDTS_Terms_Description =
1{ SDTS_Point_and_Vector_Object_Type
+
(Point_and_Vector_Object_Count) }n
VPF_Terms_Description =
VPF_Topology_Level +
1{ VPF_Point_and_Vector_Object_Type +
(Point_and_Vector_Object_Count) }n
Raster_Object_Information =
Raster_Object_Type +
(Row_Count +
Column_Count +
0{Vertical_Count}1 )
.1 Indirect Spatial Reference -- name of types of
geographic features, addressing schemes, or other
means through which locations are referenced in the
data set.
Type: text
Domain: free text
.2 Direct Spatial Reference Method -- the system of
objects used to represent space in the data set.
Type: text
Domain: "Point" "Vector" "Raster"
.3 Point and Vector Object Information -- the types
and numbers of vector or nongridded point spatial
objects in the data set.
Type: compound
.1 SDTS Terms Description -- point
and vector object information using the
terminology and concepts from "Spatial Data
Concepts," which is chapter 2 of part 1 in
Department of Commerce, 1992, Spatial Data
Transfer Standard (SDTS) (Federal Information
Processing Standard 173): Washington,
Department of Commerce, National Institute of
Standards and Technology. (Note that this
reference to the SDTS is used ONLY to provide a
set of terminology for the point and vector
objects.)
Type: compound
.1 SDTS Point and Vector
Object Type -- name of point and vector
spatial objects used to locate zero-, one-,
and two-dimensional spatial locations in
the data set.
Type: text
Domain: (The domain is from
"Spatial Data Concepts,"
which is chapter 2 of part
1 in Department of
Commerce, 1992, Spatial
Data Transfer Standard
(SDTS) (Federal
Information Processing
Standard 173):
Washington, Department
of Commerce, National
Institute of Standards
and Technology):
"Point" "Entity point"
"Label point" "Area
point" "Node, planar
graph" "Node, network"
"String" "Link"
"Complete chain" "Area
chain"
"Network chain, planar g
raph"
"Network chain, nonplan
ar graph"
"Circular arc, three point
center" "Elliptical arc"
"Uniform B-spline"
"Piecewise Bezier"
"Ring with mixed compo
sition"
"Ring composed of string
s"
"Ring composed of chain
s"
"Ring composed of arcs"
"G-polygon"
"GT-polygon composed o
f rings"
"GT-polygon composed o
f chains"
"Universe polygon comp
osed of rings"
"Universe polygon comp
osed of chains"
"Void polygon composed
of rings"
"Void polygon composed
of chains"
.2 Point and Vector Object
Count -- the total number of the point or
vector object type occurring in the data set.
Type: integer
Domain: Point and Vector Object
Count > 0
.2 VPF Terms Description -- point and
vector object information using the terminology
and concepts from Department of Defense, 1992,
Vector Product Format (MIL-STD-600006):
Philadelphia, Department of Defense, Defense
Printing Service Detachment Office. (Note that
this reference to the VPF is used ONLY to
provide a set of terminology for the point and
vector objects.)
Type: compound
.1 VPF Topology Level --
the completeness of the topology carried by
the data set. The levels of completeness
are defined in Department of Defense,
1992, Vector Product Format (MIL-STD-
600006): Philadelphia, Department of
Defense, Defense Printing Service
Detachment Office.
Type: integer
Domain: 0 <= VPF Topology
Level <= 3
.2 VPF Point and Vector
Object Type -- name of point and vector
spatial objects used to locate zero-, one-,
and two-dimensional spatial locations in
the data set.
Type: text
Domain: (The domain is from
Department of Defense,
1992, Vector Product
Format (MIL-STD-
600006): Philadelphia,
Department of Defense,
Defense Printing Service
Detachment Office):
"Node" "Edge" "Face"
"Text"
.4 Raster Object Information -- the types and
numbers of raster spatial objects in the data set.
Type: compound
.1 Raster Object Type -- raster spatial
objects used to locate zero-, two-, or three-
dimensional locations in the data set.
Type: text
Domain: (With the exception of "voxel",
the domain is from "Spatial
Data Concepts," which is
chapter 2 of part 1 in
Department of Commerce,
1992, Spatial Data Transfer
Standard (SDTS) (Federal
Information Processing
Standard 173): Washington,
Department of Commerce,
National Institute of Standards
and Technology):
"Point" "Pixel" "Grid Cell"
"Voxel"
.2 Row Count -- the maximum number
of raster objects along the ordinate (y) axis. For
use with rectangular raster objects.
Type: Integer
Domain: Row Count > 0
.3 Column Count -- the maximum
number of raster objects along the abscissa (x)
axis. For use with rectangular raster objects.
Type: Integer
Domain: Column Count > 0
.4 Vertical Count -- the maximum
number of raster objects along the vertical (z)
axis. For use with rectangular volumetric raster
objects (voxels).
Type: Integer
Domain: Depth Count > 0
4 Spatial Reference Information -- the description of the
reference frame for, and the means to encode, coordinates in
the data set.
Type: compound
Spatial_Reference_Information =
0{Horizontal_Coordinate_System_Definition}1 +
0{Vertical_Coordinate_System_Definition}1
Horizontal_Coordinate_System_Definition =
[Geographic |
1{Planar}n |
Local] +
0{Geodetic_Model}1
Geographic =
Latitude_Resolution +
Longitude_Resolution +
Geographic_Coordinate_Units
Planar =
[Map_Projection |
Grid_Coordinate_System |
Local_Planar] +
Planar_Coordinate_Information
Map_Projection =
Map_Projection_Name +
[Albers_Conical_Equal_Area |
Azimuthal_Equidistant |
Equidistant_Conic |
Equirectangular |
General_Vertical_Near-sided_Perspective |
Gnomonic |
Lambert_Azimuthal_Equal_Area |
Lambert_Conformal_Conic |
Mercator |
Modified_Stereographic_for_Alaska |
Miller_Cylindrical |
Oblique_Mercator |
Orthographic |
Polar_Stereographic |
Polyconic |
Robinson |
Sinusoidal |
Space_Oblique_Mercator_(Landsat) |
Stereographic |
Transverse Mercator |
van_der_Grinten |
Other_Projection's_Definition]
Albers_Conical_Equal_Area =
1{Standard_Parallel}2 +
Longitude_of_Central_Meridian +
Latitude_of_Projection_Origin +
False_Easting +
False_Northing
Azimuthal_Equidistant =
Longitude_of_Central_Meridian +
Latitude_of_Projection_Origin +
False_Easting +
False_Northing
Equidistant_Conic =
1{Standard_Parallel}2 +
Longitude_of_Central_Meridian +
Latitude_of_Projection_Origin +
False_Easting +
False_Northing
Equirectangular =
Standard_Parallel +
Longitude_of_Central_Meridian +
False_Easting +
False_Northing
General_Vertical_Near-sided_Perspective =
Height_of_Perspective_Point_Above_Surface +
Longitude_of_Projection_Center +
Latitude_of_Projection_Center +
False_Easting +
False_Northing
Gnomonic =
Longitude_of_Projection_Center +
Latitude_of_Projection_Center +
False_Easting +
False_Northing
Lambert_Azimuthal_Equal_Area =
Longitude_of_Projection_Center +
Latitude_of_Projection_Center +
False_Easting +
False_Northing
Lambert_Conformal_Conic =
1{Standard_Parallel}2 +
Longitude_of_Central_Meridian +
Latitude_of_Projection_Origin +
False_Easting +
False_Northing
Mercator =
[Standard_Parallel |
Scale_Factor_at_Equator] +
Longitude_of_Central_Meridian +
False_Easting +
False_Northing
Modified_Stereographic_for_Alaska =
False_Easting +
False_Northing
Miller_Cylindrical =
Longitude_of_Central_Meridian +
False_Easting +
False_Northing
Oblique_Mercator =
Scale_Factor_at_Center_Line +
[Oblique_Line_Azimuth |
Oblique_Line_Point] +
Latitude_of_Projection_Origin +
False_Easting +
False_Northing
Oblique_Line_Azimuth =
Azimuthal_Angle +
Azimuth_Measure_Point_Longitude
Oblique_Line_Point =
2{Oblique_Line_Latitude +
Oblique_Line_Longitude}2
Orthographic =
Longitude_of_Projection_Center +
Latitude_of_Projection_Center +
False_Easting +
False_Northing
Polar_Stereographic =
Straight-Vertical_Longitude_from_Pole +
[Standard_Parallel |
Scale_Factor_at_Projection_Origin] +
False_Easting +
False_Northing
Polyconic =
Longitude_of_Central_Meridian +
Latitude_of_Projection_Origin +
False_Easting +
False_Northing
Robinson =
Longitude_of_Projection_Center +
False_Easting +
False_Northing
Sinusoidal =
Longitude_of_Central_Meridian +
False_Easting +
False_Northing
Space_Oblique_Mercator_(Landsat) =
Landsat_Number +
Path_Number +
False_Easting +
False_Northing
Stereographic =
Longitude_of_Projection_Center +
Latitude_of_Projection_Center +
False_Easting +
False_Northing
Transverse_Mercator =
Scale_Factor_at_Central_Meridian +
Longitude_of_Central_Meridian +
Latitude_of_Projection_Origin +
False_Easting +
False_Northing
van_der_Grinten =
Longitude_of_Central_Meridian +
False_Easting +
False_Northing
Grid_Coordinate_System =
Grid_Coordinate_System_Name +
[Universal_Transverse_Mercator |
Universal_Polar_Stereographic |
State_Plane_Coordinate_System |
ARC_Coordinate_System |
Other_Grid_System's_Definition]
Universal_Transverse_Mercator =
UTM_Zone_Number +
Transverse_Mercator
Universal_Polar_Stereographic =
UPS_Zone_Identifier +
Polar_Stereographic
State_Plane_Coordinate_System =
SPCS_Zone_Identifier +
[Lambert_Conformal_Conic |
Transverse_Mercator |
Oblique_Mercator |
Polyconic]
ARC_Coordinate_System =
ARC_System_Zone_Identifier +
[Equirectangular |
Azimuthal_Equidistant]
Local_Planar =
Local_Planar_Description +
Local_Planar_Georeference_Information
Planar_Coordinate_Information =
Planar_Coordinate_Encoding_Method +
[Coordinate_Representation |
Distance_and_Bearing_Representation]
+
Planar_Distance_Units
Coordinate_Representation =
Abscissa_Resolution +
Ordinate_Resolution
Distance_and_Bearing_Representation =
Distance_Resolution +
Bearing_Resolution +
Bearing_Units +
Bearing_Reference_Direction +
Bearing_Reference_Meridian
Local =
Local_Description +
Local_Georeference_Information
Geodetic_Model =
0{Horizontal_Datum_Name}1 +
Ellipsoid_Name +
Semi-major_Axis +
Denominator_of_Flattening_Ratio
Vertical_Coordinate_System_Definition =
0{Altitude_System_Definition}1 +
0{Depth_System_Definition}1
Altitude_System_Definition =
Altitude_Datum_Name +
1{Altitude_Resolution}n +
Altitude_Distance_Units +
Altitude_Encoding_Method
Depth_System_Definition =
Depth_Datum_Name +
1{Depth_Resolution}n +
Depth_Distance_Units +
Depth_Encoding_Method
.1 Horizontal Coordinate System Definition -- the
reference frame or system from which linear or angular
quantities are measured and assigned to the position
that a point occupies.
Type: compound
.1 Geographic -- the quantities of
latitude and longitude which define the position
of a point on the Earth's surface with respect to a
reference spheroid.
Type: compound
.1 Latitude Resolution --
the minimum difference between two
adjacent latitude values expressed in
Geographic Coordinate Units of measure.
Type: real
Domain: Latitude Resolution > 0.0
.2 Longitude Resolution --
the minimum difference between two
adjacent longitude values expressed in
Geographic Coordinate Units of measure.
Type: real
Domain: Longitude Resolution >
0.0
.3 Geographic Coordinate
Units -- units of measure used for the
latitude and longitude values.
Type: text
Domain: "Decimal degrees"
"Decimal minutes"
"Decimal seconds"
"Degrees and decimal
minutes" "Degrees,
minutes, and decimal
seconds" "Radians"
"Grads"
.2 Planar -- the quantities of distances,
or distances and angles, which define the
position of a point on a reference plane to which
the surface of the Earth has been projected.
Type: compound
.1 Map Projection -- the
systematic representation of all or part of
the surface of the Earth on a plane or
developable surface.
Type: compound
.1 Map
Projection Name -- name of the map
projection.
Type: text
Domain: "Albers Conical
Equal Area"
"Azimuthal Equidi
stant" "Equidistant
Conic"
"Equirectangular"
"General Vertical
Near-sided
Projection"
"Gnomomic"
"Lambert
Azimuthal Equal
Area"
"Lambert Conform
al Conic"
"Mercator"
"Modified Stereogr
aphic for Alaska"
"Miller Cylindrical
" "Oblique
Mercator"
"Orthographic"
"Polar
Stereographic"
"Polyconic"
"Robinson"
"Sinusoidal"
"Space Oblique
Mercator"
"Stereographic"
"Transverse
Mercator"
"van der Grinten"
"other projection"
.2 (map
projection parameters for:) Albers
Conical Equal Area, Azimuthal
Equidistant, Equidistant Conic,
Equirectangular, General Vertical
Near-sided Projection, Gnomomic,
Lambert Azimuthal Equal Area,
Lambert Conformal Conic, Mercator,
Modified Stereographic for Alaska,
Miller Cylindrical, Oblique
Mercator, Orthographic, Polar
Stereographic, Polyconic, Robinson,
Sinusoidal, Space Oblique Mercator
(Landsat), Stereographic, Transverse
Mercator, van der Grinten --
parameters for a specific map
projection, each having a unique
mathematical relationship between
the Earth and the plane or
developable surface.
Type: compound
(The data elements 4.1.2.1.2.1
through 4.1.2.1.2.17 are map
projection parameters. Each map
projection has a specific set of
defining parameters. These sets of
parameters are provided in the
syntax for each projection.)
.1
Standard Parallel -- line
of constant latitude at which
the surface of the Earth and the
plane or developable surface
intersect.
Type: real
Domain: -90.0 <=
Standard
Parallel <=
90.0
.2
Longitude of Central
Meridian -- the line of
longitude at the center of a
map projection generally used
as the basis for constructing the
projection.
Type: real
Domain: -180.0 <=
Longitude of
Central
Meridian <
180.0
.3
Latitude of Projection
Origin -- latitude chosen as the
origin of rectangular
coordinates for a map
projection.
Type: real
Domain: -90.0 <=
Latitude of
Projection
Origin <=
90.0
.4
False Easting -- the value
added to all "x" values in the
rectangular coordinates for a
map projection. This value
frequently is assigned to
eliminate negative numbers.
Expressed in the unit of
measure identified in Planar
Coordinate Units.
Type: real
Domain: free real
.5
False Northing -- the
value added to all "y" values in
the rectangular coordinates for
a map projection. This value
frequently is assigned to
eliminate negative numbers.
Expressed in the unit of
measure identified in Planar
Coordinate Units.
Type: real
Domain: free real
.6
Scale Factor at Equator -
- a multiplier for reducing a
distance obtained from a map
by computation or scaling to
the actual distance along the
equator.
Type: real
Domain: Scale Factor
at Equator >
0.0
.7
Height of Perspective
Point Above Surface -- height
of viewpoint above the Earth,
expressed in meters.
Type: real
Domain: Height of
Perspective
Point Above
Surface > 0.0
.8
Longitude of Projection
Center -- longitude of the point
of projection for azimuthal
projections.
Type: real
Domain: -180.0 <=
Longitude of
Projection
Center <
180.0
.9
Latitude of Projection
Center -- latitude of the point
of projection for azimuthal
projections.
Type: real
Domain: -90.0 <=
Latitude of
Projection
Center <=
90.0
.10
Scale Factor at Center
Line -- a multiplier for
reducing a distance obtained
from a map by computation or
scaling to the actual distance
along the center line.
Type: real
Domain: Scale Factor
at Center Line > 0.0
.11
Oblique Line Azimuth --
method used to describe the
line along which an oblique
mercator map projection is
centered using the map
projection origin and an
azimuth.
Type: compound
.1 Azimuthal Angle -- angle measured clockwise from north, and expressed in degrees.
Type: real
Domain: 0.0 <=
Azimut
hal
Angle <
360.0
.2 Azimuth Measure Point Longitude -- longitude of the map projection origin.
Type: real
Domain: -180.0
<=
Azimut
h
Measur
e Point
Longitu
de <
180.0
.12
Oblique Line Point --
method used to describe the
line along which an oblique
mercator map projection is
centered using two points near
the limits of the mapped region
that define the center line.
Type: compound
.1 Oblique Line Latitude -- latitude of a point defining the oblique line.
Type: real
Domain: -90.0
<=
Oblique
Line
Latitude
<= 90.0
.2 Oblique Line Longitude -- longitude of a point defining the oblique line.
Type: real
Domain: -180.0
<=
Oblique
Line
Longitu
de <
180.0
.13
Straight Vertical
Longitude from Pole --
longitude to be oriented
straight up from the North or
South Pole.
Type: real
Domain: -180.0 <=
Straight
Vertical
Longitude
from Pole <
180.0
.14
Scale Factor at Projection
Origin -- a multiplier for
reducing a distance obtained
from a map by computation or
scaling to the actual distance at
the projection origin.
Type: real
Domain: Scale Factor
at Projection
Origin > 0.0
.15
Landsat Number --
number of the Landsat satellite.
(Note: This data element
exists solely to provide a
parameter needed to define the
space oblique mercator
projection. It is not used to
identify data originating from
a remote sensing vehicle.)
Type: Integer
Domain: 0 < Landsat
Number < 5
.16
Path Number -- number
of the orbit of the Landsat
satellite. (Note: This data
element exists solely to provide
a parameter needed to define
the space oblique mercator
projection. It is not used to
identify data originating from
a remote sensing vehicle.)
Type: integer
Domain: 0 < Path
Number
< 251
for
Landsat
s 1, 2,
or 3
0 < Path
Number <
233 for
Landsats 4 or
5
.17
Scale Factor at Central
Meridian -- a multiplier for
reducing a distance obtained
from a map by computation or
scaling to the actual distance
along the central meridian.
Type: real
Domain: Scale Factor
at Central
Meridian >
0.0
.3 Other
Projection's Definition -- a complete
description of a projection, not
defined elsewhere in this standard,
that was used for the data set. The
information provided shall include
the name of the projection, the names
of the parameters and values used for
the data set, and the citation of the
specification for the algorithms that
describe the mathematical
relationship between the Earth and
the plane or developable surface for
the projection.
Type: text
Domain: free text
.2 Grid Coordinate System
-- a plane-rectangular coordinate system
usually based on, and mathematically
adjusted to, a map projection so that
geographic positions can be readily
transformed to and from plane
coordinates.
Type: compound
.1 Grid
Coordinate System Name -- name of
the grid coordinate system.
Type: text
Domain: "Universal
Transverse
Mercator"
"Universal Polar St
ereographic"
"State Plane Coord
inate System 1927"
"State Plane Coord
inate System 1983"
"ARC Coordinate
System"
"other grid system"
.2 Universal
Transverse Mercator (UTM) -- a grid
system based on the transverse
mercator projection, applied between
latitudes 84 degrees north and 80
degrees south on the Earth's surface.
Type: compound
.1
UTM Zone Number --
identifier for the UTM zone.
Type: integer
Domain: 1 <= UTM
Zone Number
<= 60 for the
northern
hemisphere;
-60 <= UTM
Zone Number
<= -1 for the
southern
hemisphere
.3 Universal
Polar Stereographic (UPS) -- a grid
system based on the polar
stereographic projection, applied to
the Earth's polar regions north of 84
degrees north and south of 80
degrees south.
Type: compound
.1
UPS Zone Identifier --
identifier for the UPS zone.
Type: text
Domain: "A" "B" "Y"
"Z"
.4 State Plane
Coordinate System (SPSC) -- a
plane-rectangular coordinate system
established for each state in the
United States by the National
Geodetic Survey.
Type: compound
.1
SPCS Zone Identifier --
identifier for the SPCS zone.
Type: text
Domain: Four-digit
numeric codes
for the State
Plane
Coordinate
Systems based
on the North
American
Datum of
1927 are
found in
Department of
Commerce,
1986,
Representatio
n of
geographic
point
locations for
information
interchange
(Federal
Information
Processing
Standard 70-
1):
Washington:
Department of
Commerce,
National
Institute of
Standards and
Technology.
Codes for the
State Plane
Coordinate
Systems based
on the North
American
Datum of
1983 are
found in
Department of
Commerce,
1989
(January),
State Plane
Coordinate
System of
1983
(National
Oceanic and
Atmospheric
Administratio
n Manual
NOS NGS 5):
Silver
Spring,
Maryland,
National
Oceanic and
Atmospheric
Administratio
n, National
Ocean
Service, Coast
and Geodetic
Survey.
.5 ARC
Coordinate System -- the Equal Arc-
second Coordinate System, a plane-
rectangular coordinate system
established in Department of
Defense, 1990, Military specification
ARC Digitized Raster Graphics
(ADRG) (MIL-A-89007):
Philadelphia, Department of Defense,
Defense Printing Service Detachment
Office.
Type: compound
.1
ARC System Zone
Identifier -- identifier for the
ARC Coordinate System Zone.
Type: integer
Domain: 1 <= ARC
System Zone Identifier <= 18
.6 Other Grid
System's Definition -- a complete
description of a grid system, not
defined elsewhere in this standard,
that was used for the data set. The
information provided shall include
the name of the grid system, the
names of the parameters and values
used for the data set, and the citation
of the specification for the algorithms
that describe the mathematical
relationship between the Earth and
the coordinates of the grid system.
Type: text
Domain: free text
.3 Local Planar -- any right-
handed planar coordinate system of which
the z-axis coincides with a plumb line
through the origin that locally is aligned
with the surface of the Earth.
Type: compound
.1 Local Planar
Description -- a description of the
local planar system.
Type: text
Domain: free text
.2 Local Planar
Georeference Information -- a
description of the information
provided to register the local planar
system to the Earth (e.g. control
points, satellite ephemeral data,
inertial navigation data).
Type: text
Domain: free text
.4 Planar Coordinate
Information -- information about the
coordinate system developed on the planar
surface.
Type: compound
.1 Planar
Coordinate Encoding Method -- the
means used to represent horizontal
positions.
Type: text
Domain: "coordinate pair"
"distance and
bearing" "row and
column"
.2 Coordinate
Representation -- the method of
encoding the position of a point by
measuring its distance from
perpendicular reference axes (the
"coordinate pair" and "row and
column" methods).
Type: compound
.1
Abscissa Resolution --
the (nominal) minimum
distance between the "x" or
column values of two adjacent
points, expressed in Planar
Distance Units of measure.
Type: real
Domain: Abscissa
Resolution > 0.0
.2
Ordinate Resolution --
the (nominal) minimum
distance between the "y" or row
values of two adjacent points,
expressed in Planar Distance
Units of measure.
Type: real
Domain: Ordinate
Resolution > 0.0
.3 Distance and
Bearing Representation -- a method
of encoding the position of a point by
measuring its distance and direction
(azimuth angle) from another point.
Type: compound
.1
Distance Resolution --
the minimum distance
measurable between two
points, expressed Planar
Distance Units of measure.
Type: real
Domain: Distance
Resolution > 0.0
.2
Bearing Resolution -- the
minimum angle measurable
between two points, expressed
in Bearing Units of measure.
Type: real
Domain: Bearing
Resolution > 0.0
.3
Bearing Units -- units of
measure used for angles.
Type: text
Domain: "Decimal
degrees"
"Decimal
minutes"
"Decimal
seconds"
"Degrees and
decimal
minutes"
"Degrees,
minutes, and
decimal
seconds"
"Radians"
"Grads"
.4
Bearing Reference
Direction -- direction from
which the bearing is measured.
Type: text
Domain: "North"
"South"
.5
Bearing Reference
Meridian -- axis from which
the bearing is measured.
Type: text
Domain: "Assumed"
"Grid"
"Magnetic"
"Astronomic"
"Geodetic"
.4 Planar
Distance Units -- units of measure
used for distances.
Type: text
Domain: "meters"
"international feet"
"survey feet" free
text
.3 Local -- a description of any
coordinate system that is not aligned with the
surface of the Earth.
Type: compound
.1 Local Description -- a
description of the coordinate system and its
orientation to the surface of the Earth.
Type: text
Domain: free text
.2 Local Georeference
Information -- a description of the
information provided to register the local
system to the Earth (e.g. control points,
satellite ephemeral data, inertial navigation
data).
Type: text
Domain: free text
.4 Geodetic Model -- parameters for the
shape of the earth.
Type: compound
.1 Horizontal Datum Name
-- the identification given to the reference
system used for defining the coordinates of
points.
Type: text
Domain: "North American Datum
of 1927"
"North American Datum
of 1983" free text
.2 Ellipsoid Name --
identification given to established
representations of the Earth's shape.
Type: text
Domain: "Clarke 1866"
"Geodetic Reference Syst
em 80" free text
.3 Semi-major Axis --
radius of the equatorial axis of the
ellipsoid.
Type: real
Domain: Semi-major Axis > 0.0
.4 Denominator of
Flattening Ratio -- the denominator of the
ratio of the difference between the
equatorial and polar radii of the ellipsoid
when the numerator is set to 1.
Type: real
Domain: Denominator of
Flattening > 0.0
.2 Vertical Coordinate System Definition -- the
reference frame or system from which vertical
distances (altitudes or depths) are measured.
Type: compound
.1 Altitude System Definition -- the
reference frame or system from which altitudes
(elevations) are measured. The term "altitude"' is
used instead of the common term "elevation" to
conform to the terminology in Federal
Information Processing Standards 70-1 and 173.
Type: compound
.1 Altitude Datum Name --
the identification given to the level surface
taken as the surface of reference from
which altitudes are measured.
Type: text
Domain: "National Geodetic
Vertical Datum of 1929"
"North American
Vertical Datum of 1988"
free text
.2 Altitude Resolution -- the
minimum distance possible between two
adjacent altitude values, expressed in
Altitude Distance Units of measure.
Type: real
Domain: Altitude Resolution > 0.0
.3 Altitude Distance Units -
- units in which altitudes are recorded.
Type: text
Domain: "meters" "feet" free text
.4 Altitude Encoding
Method -- the means used to encode the
altitudes.
Type: text
Domain: "Explicit elevation
coordinate included with
horizontal coordinates"
"Implicit coordinate"
"Attribute values"
.2 Depth System Definition -- the
reference frame or system from which depths are
measured.
Type: compound
.1 Depth Datum Name --
the identification given to surface of
reference from which depths are measured.
Type: text
Domain: "Local surface" "Chart
datum; datum for
sounding reduction"
"Lowest astronomical
tide"
"Highest astronomical
tide" "Mean low water"
"Mean high water"
"Mean sea level"
"Land survey datum"
"Mean low water springs
"
"Mean high water spring
s"
"Mean low water neap"
"Mean high water neap"
"Mean lower low water"
"Mean lower low water
springs" "Mean higher
high water"
"Mean higher low water"
"Mean lower high water"
"Spring tide" "Tropic
lower low water" "Neap
tide" "High water"
"Higher high water"
"Low water" "Low-water
datum"
"Lowest low water"
"Lower low water"
"Lowest normal low
water" "Mean tide level"
"Indian spring low
water"
"High-water full and cha
rge" "Low-water full and
charge"
"Columbia River datum"
"Gulf Coast low water
datum"
"Equatorial springs low
water"
"Approximate lowest
astronomical tide"
"No correction" free text
.2 Depth Resolution -- the
minimum distance possible between two
adjacent depth values, expressed in Depth
Distance Units of measure.
Type: real
Domain: Depth Resolution > 0.0
.3 Depth Distance Units --
units in which depths are recorded.
Type: text
Domain: "meters" "feet" free text
.4 Depth Encoding Method
-- the means used to encode depths.
Type: text
Domain: "Explicit depth
coordinate included with
horizontal coordinates"
"Implicit coordinate"
"Attribute values"
5 Entity and Attribute Information -- information about the
information content of the data set, including the entities
types, their attributes, and the domains from which attribute
values may be assigned.
Type: compound
Entity_and_Attribute_Information =
[Detailed_Description |
Overview_Description |
Detailed_Description +
Overview_Description]
Detailed_Description =
1{Entity_Type +
0{Attribute}n }n
Entity_Type =
Entity_Type_Label +
Entity_Type_Definition +
Entity_Type_Definition_Source
Attribute =
Attribute_Label +
Attribute_Definition +
Attribute_Definition_Source
1{Attribute_Domain_Values}n +
0{Attribute_Units_of_Measure}1 +
(Attribute_Measurement_Resolution) +
( 1{Beginning_Date_of_Attribute_Values +
0{Ending_Date_of_Attribute_Values}1
}n ) +
(Attribute_Value_Accuracy_Information) +
(Attribute_Measurement_Frequency)
Attribute_Domain_Values =
[Enumerated_Domain |
Range_Domain |
Codeset_Domain |
Unrepresentable_Domain]
Enumerated_Domain =
1{Enumerated_Domain_Value +
Enumerated_Domain_Value_Definition +
Enumerated_Domain_Value_Definition_Source +
0{Attribute}n }n
Range_Domain =
Range_Domain_Minimum +
Range_Domain_Maximum +
0{Attribute}n
Codeset_Domain=
Codeset_Name +
Codeset_Source
Attribute_Value_Accuracy_Information =
Attribute_Value_Accuracy +
Attribute_Value_Accuracy_Explanation
Overview_Description =
1{Entity_and_Attribute_Overview +
1{Entity_and_Attribute_Detail_Citation}n }n
.1 Detailed Description -- description of the entities,
attributes, attribute values, and related characteristics
encoded in the data set.
Type: compound
.1 Entity Type -- the definition and
description of a set into which similar entity
instances are classified.
Type: compound
.1 Entity Type Label -- the
name of the entity type.
Type: text
Domain: free text
.2 Entity Type Definition --
the description of the entity type.
Type: text
Domain: free text
.3 Entity Type Definition Source
-- the authority of the definition.
Type: text
Domain: free text
.2 Attribute -- a defined characteristic
of an entity.
Type: compound
.1 Attribute Label -- the
name of the attribute.
Type: text
Domain: free text
.2 Attribute Definition --
the description of the attribute.
Type: text
Domain: free text
.3 Attribute Definition Source --
the authority of the definition.
Type: text
Domain: free text
.4 Attribute Domain Values
-- the valid values that can be assigned for
an attribute.
Type: compound
.1 Enumerated
Domain -- the members of an
established set of valid values.
Type: compound
.1
Enumerated Domain
Value -- the name or label of a
member of the set.
Type: text
Domain: free text
.2
Enumerated Domain
Value Definition -- the
description of the value.
Type: text
Domain: free text
.3
Enumerated Domain
Value Definition Source -- the
authority of the definition.
Type: text
Domain: free text
.2 Range
Domain -- the minimum and
maximum values of a continuum of
valid values.
Type: compound
.1
Range Domain
Minimum -- the least value
that the attribute can be
assigned.
Type: text
Domain: free text
.2
Range Domain
Maximum -- the greatest value
that the attribute can be
assigned.
Type: text
Domain: free text
.3 Codeset
Domain -- reference to a standard or
list which contains the members of
an established set of valid values.
Type: compound
.1
Codeset Name -- the title
of the codeset.
Type: text
Domain: free text
.2 Codeset Source -- the authority
for the codeset.
Type: text
Domain: free text
.4
Unrepresentable Domain --
description of the values and reasons
why they cannot be represented.
Type: text
Domain: free text
.5 Attribute Units of
Measurement -- the standard of
measurement for an attribute value.
Type: text
Domain: free text
.6 Attribute Measurement
Resolution -- the smallest unit increment to
which an attribute value is measured.
Type: real
Domain: Attribute Measurement
Resolution > 0.0
.7 Beginning Date of
Attribute Values -- earliest or only date for
which the attribute values are current. In
cases when a range of dates are provided,
this is the earliest date for which the
information are valid.
Type: date
Domain: free date
.8 Ending Date of Attribute
Values -- latest date for which the
information are current. Used in cases
when a range of dates are provided.
Type: date
Domain: free date
.9 Attribute Value Accuracy
Information -- an assessment of the
accuracy of the assignment of attribute
values.
Type:
compound
.1 Attribute Value Accuracy
-- an estimate of the accuracy of the
assignment of attribute values.
Type: real
Domain: free real
.2 Attribute Value Accuracy
Explanation -- the definition of the
Attribute Value Accuracy measure
and units, and a description of how
the estimate was derived.
Type: text
Domain: free text
.10 Attribute Measurement
Frequency -- the frequency with which
attribute values are added.
Type: real
Domain: "Unknown" "As needed"
"Irregular" "None
planned" free text
.2 Overview Description -- summary of, and
citation to detailed description of, the information
content of the data set.
Type: compound
.1 Entity and Attribute Overview --
detailed summary of the information contained in
a data set.
Type: text
Domain: free text
.2 Entity and Attribute Detail Citation -
- reference to the complete description of the
entity types, attributes, and attribute values for
the data set.
Type: text
Domain: free text
6 Distribution Information -- information about the distributor
of and options for obtaining the data set.
Type: compound
Distribution_Information =
1{Distributor +
0{Resource_Description}1 +
Distribution_Liability +
0{Standard_Order_Process}n +
0{Custom_Order_Process}1 +
(Technical_Prerequisites) +
(Available_Time_Period) }n
Distributor =
Contact_Information (see section 10 for production rules)
Standard_Order_Process =
[Non-digital_Form |
1{Digital_Form}n ] +
Fees +
(Ordering_Instructions) +
(Turnaround)
Digital_Form =
Digital_Transfer_Information +
Digital_Transfer_Option
Digital_Transfer_Information =
Format_Name +
([Format_Version_Number |
Format_Version_Date] +
(Format_Specification) ) +
(Format_Information_Content) +
0{File_Decompression_Technique}1 +
(Transfer_Size)
Digital_Transfer_Option =
1{ [Online_Option |
Offline_Option] }n
Online_Option =
1{Computer_Contact_Information}n +
(Access_Instructions) +
(Online_Computer_and_Operating_System)
Computer_Contact_Information =
[Network_Address |
Dialup_Instructions]
Network_Address =
1{Network_Resource_Name}n
Dialup_Instructions =
Lowest_BPS +
0{Highest_BPS}1 +
Number_DataBits +
Number_StopBits +
Parity +
0{Compression_Support}1 +
1{Dialup_Telephone}n +
1{Dialup_File_Name}n
Offline_Option =
Offline_Media +
0{Recording_Capacity}1
1{Recording_Format}n +
0{Compatibility_Information}1
Recording_Capacity =
1{Recording Density}n +
Recording_Density_Units
Available_Time_Period =
Time_Period_Information (see section 9
for production rules)
.1 Distributor -- the party from whom the data set
may be obtained.
Type: compound
.2 Resource Description -- the identifier by which
the distributor knows the data set.
Type: text
Domain: free text
.3 Distribution Liability -- statement of the liability
assumed by the distributor.
Type: text
Domain: free text
.4 Standard Order Process -- the common ways in
which the data set may be obtained or received, and
related instructions and fee information.
Type: compound
.1 Non-digital Form -- the description
of options for obtaining the data set on non-
computer-compatible media.
Type: text
Domain: free text
.2 Digital Form -- the description of
options for obtaining the data set on computer-
compatible media.
Type:
compound
.1 Digital Transfer
Information - description of the form of the
data to be distributed.
Type: compound
.1 Format Name
-- the name of the data transfer
format.
Type: text
Domain: domain values
from the table
below; free text
Domain
Value Definition
"ARCE"
ARC/INFO Export format
"ARCG"
ARC/INFO Generate format
"ASCII" ASCII
file,
formatte
d for
text
attribute
s,
declared
format
"BIL"
I
magery,
band
interlea
ved by
line
"BIP"
I
magery,
band
interlea
ved by
pixel
"BSQ"
I
magery,
band
interlea
ved
sequenti
al
"CDF"
C
ommon
Data
Format
"CFF"
C
artograp
hic
Feature
File
(U.S. Fo
rest
Service)
"COORD" User-created
coordin
ate file,
declared
format
"DEM" Digital
Elevatio
n Model
format
(U.S. G
eologica
l
Survey)
"DFAD" Digital
Feature
Analysi
s Data
(Defens
e
Mappin
g
Agency)
"DGN"
M
icrostati
on
format
(Intergr
aph
Corpora
tion)
"DIGEST" Digital
Geogra
phic
Informa
tion
Exchan
ge
Standar
d
"DLG" Digital
Line
Graph
(U.S. G
eologica
l
Survey)
"DTED" Digital
Terrain
Elevatio
n Data
(MIL-
D-
89020)
"DWG"
A
utoCAD
Drawin
g
format
"DX90" Data
Exchan
ge '90
"DXF"
A
utoCAD
Drawin
g
Exchan
ge
Format
"ERDAS" ERDAS
image
files
(ERDA
S
Corpora
tion)
"GRASS"
G
eograph
ic
Resourc
es
Analysi
s
Support
System
"HDF"
Hi
erarchic
al Data
Format
"IGDS"
In
teractiv
e
Graphic
Design
System
format
(Intergr
aph
Corpora
tion)
"IGES" Initial
Graphic
s
Exchan
ge
Standar
d
"MOSS"
M
ultiple
Overlay
Statistic
al
System
export
file
"netCDF" network
Commo
n Data
Format
"NITF"
N
ational
Imagery
Transfe
r
Format
"RPF" Raster
Product
Format
(Defens
e
Mappin
g
Agency)
"RVC" Raster
Vector
Convert
ed
format
(MicroI
mages)
"RVF" Raster
Vector
Format
(MicroI
mages)
"SDTS" Spatial
Data
Transfe
r
Standar
d
(Federal
Informa
tion
Processi
ng
Standar
d 173)
"SIF"
St
andard
Intercha
nge
Format
(DOD
Project
2851)
"SLF"
St
andard
Linear
Format
(Defens
e
Mappin
g
Agency)
"TIFF" Tagged
Image
File
Format
"TGRLN" Topologically
Integrat
ed
Geogra
phic
Encodin
g and
Referen
cing
(TIGER
) Line
format
(Bureau
of the
Census)
"VPF" Vector
Product
Format
(Defens
e
Mappin
g
Agency)
.2 Format
Version Number -- version number
of the format.
Type: text
Domain: free text
.3 Format
Version Date -- date of the version of
the format.
Type: date
Domain: free date
.4 Format
Specification -- name of a subset,
profile, or product specification of
the format.
Type: text
Domain: free text
.5 Format
Information Content -- description of
the content of the data encoded in a
format.
Type: text
Domain: free text
.6 File
Decompression Technique --
recommendations of algorithms or
processes (including means of
obtaining these algorithms or
processes) that can be applied to read
or expand data sets to which data
compression techniques have been
applied.
Type: text
Domain: "No compression
applied" free text
.7 Transfer Size
-- the size, or estimated size, of the
transferred data set in megabytes.
Type: real
Domain: Transfer Size > 0.0
.2 Digital Transfer Option -
- the means and media by which a data set
is obtained from the distributor.
Type: compound
.1 Online Option
-- information required to directly
obtain the data set electronically.
Type: compound
.1
Computer Contact
Information -- instructions for
establishing communications
with the distribution computer.
Type: compound
.1 Network Address -- the electronic address from which the data set can be obtained from the distribution computer.
Type:
compound
.1 Network Resource Name -- the name of the file or service from which the data set can be obtained.
Type: text
Domain:
free text
.2 Dialup Instructions -- information required to access the distribution computer remotely through telephone lines.
Type:
compound
.1 Lowest BPS -- lowest or only speed for the connection's communication, expressed in bits per second.
Type: integer
Domain:
Lowest BPS >= 110
.2 Highest BPS -- highest speed for the connection's communication, expressed in bits per second. Used in cases when a range of rates are provided.
Type: integer
Domain:
Highest BPS > Lowest BPS
.3 Number DataBits -- number of data bits in each character exchanged in the communication.
Type: integer
Domain: 7
<
=
N
u
m
be
r
D
at
a
Bi
ts
<
=
8
.4 Number StopBits -- number of stop bits in each character exchanged in the communication.
Type: integer
Domain: 1
<
=
N
u
m
be
r
St
op
Bi
ts
<
=
2
.5 Parity -- parity error checking used in each character exchanged in the communication.
Type: text
Domain:
"None" "Odd" "Even" "Mark" "Space"
.6 Compression Support -- data compression available through the modem service to speed data transfer.
Type: text
Domain:
"V.32" "V.32bis" "V.42" "V.42bis" free text
.7 Dialup Telephone -- the telephone number of the distribution computer.
Type: text
Domain:
free text
.8 Dialup File Name -- the name of a file containing the data set on the distribution computer.
Type: text
Domain:
free text
.2
Access Instructions --
instructions on the steps
required to access the data set.
Type: text
Domain: free text
.3
Online Computer and
Operating System -- the brand
of distribution computer and its
operating system.
Type: text
Domain: free text
.2 Offline
Option -- information about media-
specific options for receiving the data
set.
Type: compound
.1
Offline Media -- name of
the media on which the data
set can be received.
Type: text
Domain: "CD-ROM"
"3-1/2 inch
floppy disk"
"5-1/4 inch
floppy disk"
"9-track tape"
"4 mm
cartridge
tape" "8 mm
cartridge tape
" "1/4-inch
cartridge
tape" free text
.2
Recording Capacity --
the density of information to
which data are written. Used
in cases where different
recording capacities are
possible.
Type: compound
.1 Recording Density -- the density in which the data set can be recorded.
Type: real
Domain:
Recording Density > 0.0
.2 Recording Density Units -- the units of measure for the recording density.
Type: text
Domain: free text
.3
Recording Format -- the
options available or method
used to write the data set to the
medium.
Type: text
Domain: "cpio" "tar"
"High Sierra"
"ISO 9660"
"ISO 9660 wit
h Rock Ridge
extensions"
"ISO 9660
with Apple
HFS
extensions"
free text
.4
Compatibility
Information --- description of
other limitations or
requirements for using the
medium.
Type: text
Domain: free text
.3 Fees -- the fees and terms for
retrieving the data set.
Type: text
Domain: free text
.4 Ordering Instructions -- general
instructions and advice about, and special terms
and services provided for, the data set by the
distributor.
Type: text
Domain: free text
.5 Turnaround -- typical turnaround
time for the filling of an order.
Type: text
Domain: free text
.5 Custom Order Process -- description of custom
distribution services available, and the terms and
conditions for obtaining these services.
Type: text
Domain: free text
.6 Technical Prerequisites -- description of any
technical capabilities that the consumer must have to
use the data set in the form(s) provided by the
distributor.
Type: text
Domain: free text
.7 Available Time Period -- the time period when
the data set will be available from the distributor.
Type: compound
7 Metadata Reference Information -- information on the
currentness of the metadata information, and the responsible
party.
Type: compound
Metadata_Reference_Information =
Metadata_Date +
( Metadata_Review_Date +
(Metadata_Future_Review_Date) ) +
Metadata_Contact +
Metadata_Standard_Name +
Metadata_Standard_Version +
0{Metadata_Time_Convention}1 +
(Metadata_Access_Constraints) +
(Metadata_Use_Constraints) +
(Metadata_Security_Information)
Metadata_Contact =
Contact_Information (see section 10 for production rules)
Metadata_Security_Information =
Metadata_Security_Classification_System +
Metadata_Security_Classification +
Metadata_Security_Handling_Description
.1 Metadata Date -- the date that the metadata were
created or last updated.
Type: date
Domain: free date
.2 Metadata Review Date -- the date of the latest
review of the metadata entry.
Type: date
Domain: free date; Metadata Review Date
later than Metadata Date
.3 Metadata Future Review Date -- the date by
which the metadata entry should be reviewed.
Type: date
Domain: free date; Metadata Future Review
Date later than Metadata Review
Date
.4 Metadata Contact -- the party responsible for the
metadata information.
Type: compound
.5 Metadata Standard Name -- the name of the
metadata standard used to document the data set.
Type: text
Domain: "FGDC Content Standards for
Digital Geospatial Metadata" free
text
.6 Metadata Standard Version -- identification of
the version of the metadata standard used to document
the data set.
Type: text
Domain: free text
.7 Metadata Time Convention -- form used to
convey time of day information in the metadata entry.
Used if time of day information is included in the
metadata for a data set.
Type: text
Domain: "local time" "local time with time
differential factor" "universal time"
.8 Metadata Access Constraints -- restrictions and
legal prerequisites for accessing the metadata. These
include any access constraints applied to assure the
protection of privacy or intellectual property, and any
special restrictions or limitations on obtaining the
metadata.
Type: text
Domain: free text
.9 Metadata Use Constraints -- restrictions and legal
prerequisites for using the metadata after access is
granted. These include any access constraints applied
to assure the protection of privacy or intellectual
property, and any special restrictions or limitations on
obtaining the metadata.
Type: text
Domain: free text
.10 Metadata Security Information -- handling
restrictions imposed on the metadata because of
national security, privacy, or other concerns.
Type: compound
.1 Metadata Security Classification System --
name of the classification system for the
metadata.
Type: text
Domain: free text
.2 Metadata Security Classification -- name of
the handling restrictions on the metadata.
Type: text
Domain: "Top secret" "Secret"
"Confidential" "Restricted"
"Unclassified" "Sensitive" free
text
.3 Metadata Security Handling Description --
additional information about the restrictions on
handling the metadata.
Type: text
Domain: free text
8 Citation Information -- the recommended reference to be
used for the data set. (Note: this section provides a means of
stating the citation of a data set, and is used by other
sections of the metadata standard. This section is never used
alone.)
Type: compound
Citation_Information =
1{Originator}n +
Publication_Date +
(Publication_Time) +
Title +
0{Edition}1 +
0{Geospatial_Data_Presentation_Form}1 +
0{Series_Information}1 +
0{Publication_Information}1 +
0{Other_Citation_Details}1 +
(1{Online_Linkage}n) +
0{Larger_Work_Citation}1
Series_Information =
Series_Name +
Issue_Identification
Publication_Information =
Publication_Place +
Publisher
Larger_Work_Citation =
Citation_Information
.1 Originator -- the name of an organization or
individual that developed the data set. If the name of
editors or compilers are provided, the name must be
followed by "(ed.)" or "(comp.)" respectively.
Type: text
Domain: "Unknown" free text
.2 Publication Date -- the date when the data set is
published or otherwise made available for release.
Type: date
Domain: "Unknown" "Unpublished material"
free date
.3 Publication Time -- the time of day when the data
set is published or otherwise made available for release.
Type: time
Domain: "Unknown" free time
.4 Title -- the name by which the data set is known.
Type: text
Domain: free text
.5 Edition -- the version of the title.
Type: text
Domain: free text
.6 Geospatial Data Presentation Form -- the mode
in which the geospatial data is represented.
Type: text
Domain: (the domain is from pp. 88-91 in
Anglo-American Committee on
Cataloguing of Cartographic
Materials, 1982, Cartographic
materials: A manual of
interpretation for AACR2: Chicago,
American Library Association):
"atlas" "diagram" "globe" "map"
"model" "profile"
"remote-sensing image" "section"
"view"
.7 Series Information -- the identification of the
series publication of which the data set is a part.
Type: compound
.1 Series Name -- the name of the series
publication of which the data set is a part.
Type: text
Domain: free text
.2 Issue Identification -- information
identifying the issue of the series publication of
which the data set is a part.
Type: text
Domain: free text
.8 Publication Information -- publication details for
published data sets.
Type: compound
.1 Publication Place -- the name of the
city (and state or province, and country, if needed
to identify the city) where the data set was
published or released.
Type: text
Domain: free text
.2 Publisher -- the name of the
individual or organization that published the data
set.
Type: text
Domain: free text
.9 Other Citation Details -- other information
required to complete the citation.
Type: text
Domain: free text
.10 Online Linkage -- the name of an online
computer resource that contains the data set. Entries
should follow the Uniform Resource Locator
convention of the Internet.
Type: text
Domain: free text
.11 Larger Work Citation -- the information
identifying a larger work in which the data set is
included.
Type: compound
9 Time Period Information -- information about the date and
time of an event. (Note: this section provides a means of
stating temporal information, and is used by other sections of
the metadata standard. This section is never used alone.)
Type: compound
Time_Period_Information =
[Single_Date/Time |
Multiple_Dates/Times |
Range_of_Dates/Times ]
Single_Date/Time =
Calendar_Date +
(Time_of_Day)
Multiple_Dates/Times =
2{Calendar_Date +
(Time_of_Day) }n
Range_of_Dates/Times =
Beginning_Date +
(Beginning_Time) +
Ending_Date +
(Ending_Time)
.1 Single Date/Time -- means of encoding a single
date and time.
Type: compound
.1 Calendar Date -- the year (and
optionally month, or month and day).
Type: date
Domain: "Unknown" free date
.2 Time of Day -- the hour (and
optionally minute, or minute and second) of the
day.
Type: time
Domain: "Unknown" free time
.2 Multiple Dates/Times -- means of encoding
multiple individual dates and times.
Type: compound
.3 Range of Dates/Times -- means of encoding a
range of dates and times.
Type: compound
.1 Beginning Date -- the first year (and
optionally month, or month and day) of the
event.
Type: date
Domain: "Unknown" free date
.2 Beginning Time -- the first hour (and
optionally minute, or minute and second) of the
day for the event.
Type: time
Domain: "Unknown" free time
.3 Ending Date -- the last year (and
optionally month, or month and day) for the
event.
Type: date
Domain: "Unknown" "Present" free date
.4 Ending Time -- the last hour (and
optionally minute, or minute and second) of the
day for the event.
Type: time
Domain: "Unknown" free time
10 Contact Information -- Identity of, and means to
communicate with, person(s) and organization(s) associated
with the data set. (Note: this section provides a means of
identifying individuals and organizations, and is used by
other sections of the metadata standard. This section is
never used alone.)
Type: compound
Contact_Information =
[Contact_Person_Primary |
Contact_Organization_Primary] +
(Contact_Position) +
1{Contact_Address}n +
1{Contact_Voice_Telephone}n +
(1{Contact_TDD/TTY_Telephone}n) +
(1{Contact_Facsimile_Telephone}n) +
(1{Contact_Electronic_Mail_Address}n) +
(Hours_of_Service) +
(Contact_Instructions)
Contact_Person_Primary =
Contact_Person +
(Contact_Organization)
Contact_Organization_Primary =
Contact_Organization +
(Contact_Person)
Contact_Address =
Address_Type +
0{Address}n +
City +
State_or_Province +
Postal_Code +
(Country)
.1 Contact Person Primary -- the person, and the
affiliation of the person, associated with the data set.
Used in cases where the association of the person to the
data set is more significant than the association of the
organization to the data set.
Type: compound
.1 Contact Person -- the name of the
individual to which the contact type applies.
Type: text
Domain: free text
.2 Contact Organization -- the name of the
organization to which the contact type applies.
Type: text
Domain: free text
.2 Contact Organization Primary -- the
organization, and the member of the organization,
associated with the data set. Used in cases where the
association of the organization to the data set is more
significant than the association of the person to the
data set.
Type: compound
.3 Contact Position -- the title of individual.
Type: text
Domain: free text
.4 Contact Address -- the address for the
organization or individual.
Type: compound
.1 Address Type -- the information
provided by the address.
Type: text
Domain: "mailing address" "physical
address"
"mailing and physical address"
.2 Address -- an address line for the
address.
Type: text
Domain: free text
.3 City -- the city of the address.
Type: text
Domain: free text
.4 State or Province -- the state or
province of the address.
Type: text
Domain: free text
.5 Postal Code -- the ZIP or other postal
code of the address.
Type: text
Domain: free text
.6 Country -- the country of the address.
Type: text
Domain: free text
.5 Contact Voice Telephone -- the telephone
number by which individuals can speak to the
organization or individual.
Type: text
Domain: free text
.6 Contact TDD/TTY Telephone -- the telephone
number by which hearing-impaired individuals can
contact the organization or individual.
Type: text
Domain: free text
.7 Contact Facsimile Telephone -- the telephone
number of a facsimile machine of the organization or
individual.
Type: text
Domain: free text
.8 Contact Electronic Mail Address -- the address of
the electronic mailbox of the organization or
individual.
Type: text
Domain: free text
.9 Hours of Service -- time period when individuals
can speak to the organization or individual.
Type: text
Domain: free text
.10 Contact Instructions -- supplemental instructions
on how or when to contact the individual or
organization.
Type: text
Domain: free text
[Most of the terms and definitions are from Department of Commerce, 1992,
Spatial Data Transfer Standard (SDTS) (Federal Information Processing
Standard 173): Washington: Department of Commerce, National Institute of
Standards and Technology.]
abscissa -- the coordinate of a point in a plane cartesian coordinate system
obtained by measuring parallel to the x-axis ("the 'x' value").
accuracy -- the closeness of results of observations, computations or estimates
to the true values or the values accepted as being true.
altitude -- elevation above or below a reference datum, as defined in Federal
Information Processing Standard 70-1. See also elevation.
area -- a generic term for a bounded, continuous, two-dimensional object that
may or may not include its boundary.
area chain -- a chain that explicitly references left and right polygons and not
start and end nodes. It is a component of a two-dimensional manifold.
area point -- a representative point within an area usually carrying attribute
information about that area.
arc -- a locus of points that forms a curve that is defined by a mathematical
expression.
attribute -- a defined characteristic of an entity type (e.g. composition).
attribute value -- a specific quality or quantity assigned to an attribute (e.g.,
steel), for a specific entity instance.
chain -- a directed nonbranching sequence of nonintersecting line segments and
(or) arcs bounded by nodes, not necessarily distinct, at each end. Area chain,
complete chain, and network chain are special cases of chain, and share all
characteristics of the general case as defined above.
clearinghouse -- see National Geospatial Data Clearinghouse.
complete chain -- a chain that explicitly references left and right polygons and
start and end nodes. It is a component of a two-dimensional manifold.
compound element -- a group of data elements and other compound elements.
Compound elements represent higher-level concepts that cannot be represented
by individual data elements.
coordinates -- pairs of numbers expressing horizontal distances along ortho-
gonal axes; alternatively, triplets of numbers measuring horizontal and vertical
distances.
data element -- a logically primitive item of data.
data set -- a collection of related data.
depth -- perpendicular distance of an interior point from the surface of an
object.
developable surface -- a surface that can be flattened to form a plane without
compressing or stretching any part of it. Examples include cones and
cylinders.
digital image -- a two-dimensional array of regularly spaced picture elements
(pixels) constituting a picture.
digital volume -- a three-dimensional array of regularly spaced volume
elements (voxels) constituting a volume.
domain -- in the definition of the elements in the metadata standard, the
domain identifies valid values for a data element.
Edge, Topology Level 0 -- VPF term for a string.
Edge, Topology Level 1 -- VPF term for a network chain in a network (in
SDTS, a "Network chain, non-planar graph").
Edge, Topology Level 2 -- VPF term for a network chain in a planar graph (in
SDTS, a "Network chain, planar graph").
Edge, Topology Level 3 -- VPF term for a complete chain.
elevation -- conforming to Federal Information Processing Standard 70-1, the
term "altitude" is used in this standard, rather than the common term elevation.
entity instance -- a spatial phenomenon of a defined type that is embedded in
one or more phenomena of different type, or that has at least one key attribute
value different from the corresponding attribute values of surrounding
phenomena (e.g., the 10 Street Bridge).
entity point -- a point used for identifying the location of point features (or areal
features collapsed to a point), such as towers, buoys, buildings, places, etc.
entity type -- the definition and description of a set into which similar entity
instances are classified (e.g., bridge).
explicit -- method of identifying positions directly by pairs (for horizontal
positions) or triplets (for horizontal and vertical positions) of numbers.
Face, Topology Level 3 -- VPF term for a GT-polygon composed of rings.
G-polygon -- an area consisting of an interior area, one outer G-ring and zero
or more nonintersecting, nonnested inner G-rings. No ring, inner or outer,
shall be collinear with or intersect any other ring of the same G-polygon.
G-ring -- a ring created from strings and (or) arcs.
geospatial data -- information that identifies the geographic location and
characteristics of natural or constructed features and boundaries on the earth.
This information may be derived from, among other things, remote sensing,
mapping, and surveying technologies.
graph -- a set of topologically interrelated zero-dimensional (node), one-
dimensional (link or chain), and sometimes two-dimensional (GT-polygon)
objects that conform to a set of defined constraint rules. Numerous rule sets
can be used to distinguish different types of graphs. Three such types, planar
graph, network, and two-dimensional manifold, are used in this standard. All
three share the following rules: each link or chain is bounded by an ordered
pair of nodes, not necessarily distinct; a node may bound one or more links or
chains; and links or chains may only intersect at nodes. Planar graphs and
networks are two specialized types of graphs, and a two-dimensional manifold
is an even more specific type of planar graph.
grid -- (1) a set of grid cells forming a regular, or nearly regular, tessellation of
a surface; (2) a set of points arrayed in a pattern that forms a regular, or nearly
regular, tesselation of a surface. The tessellation is regular if formed by
repeating the pattern of a regular polygon, such as a square, equilateral
triangle, or regular hexagon. The tessellation is nearly regular if formed by
repeating the pattern of an "almost" regular polygon such as a rectangle, non-
square parallelogram, or non-equilateral triangle.
grid cell -- a two-dimensional object that represents the smallest nondivisible
element of a grid.
GT-polygon -- an area that is an atomic two-dimensional component of one and
only one two-dimensional manifold. The boundary of a GT-polygon may be
defined by GT-rings created from its bounding chains. A GT-polygon may also
be associated with its chains (either the bounding set, or the complete set) by
direct reference to these chains. The complete set of chains associated with a
GT-polygon may also be found by examining the polygon references on the
chains.
GT-ring -- a ring created from complete and (or) area chains.
horizontal -- tangent to the geoid or parallel to a plane that is tangent to the
geoid.
implicit -- method of identifying positions by a place in an array of values.
interior area -- an area not including its boundary.
label point -- a reference point used for displaying map and chart text (e.g.,
feature names) to assist in feature identification.
latitude -- angular distance measured on a meridian north or south from the
equator.
layer -- an integrated, areally distributed, set of spatial data usually representing
entity instances within one theme, or having one common attribute or attribute
value in an association of spatial objects. In the context of raster data, a layer is
specifically a two-dimensional array of scaler values associated with all of part
of a grid or image.
line -- a generic term for a one-dimensional object.
line segment -- a direct line between two points.
link -- a topological connection between two nodes. A link may be directed by
ordering its nodes.
longitude -- angular distance between the plane of a meridian east or west from
the plane of the meridian of Greenwich.
map -- a spatial representation, usually graphic on a flat surface, of spatial
phenomena.
media -- the physical devices used to record, store, and (or) transmit data.
meridian -- a great circle on the Earth that passes through the geographic poles.
metadata -- data about the content, quality, condition, and other
characteristics of data.
National Geospatial Data Clearinghouse -- a distributed network of geospatial
data producers, managers, and users linked electronically. Building on
initiatives such as the national information infrastructure, the clearinghouse
uses a distributed, electronically connected network, such as the Internet. Each
data provider will describe available data in an electronic form, and provide
these descriptions (or "metadata") using means that can be accessed over a
communications network. Thus, the data for the clearinghouse are located at
the sites of data producers (or, where more efficient, at the sites of
intermediaries) throughout the country. Using the network, users will search
these descriptions to locate data that are suitable for their applications.
network -- a graph without two dimensional objects. If projected onto a two-
dimensional surface, a network can have either more than one node at a point
and (or) intersecting links or chains without corresponding nodes.
network chain -- a chain that explicitly references start and end nodes and not
left and right polygons. It is a component of a network.
node -- a zero-dimensional object that is a topological junction of two or more
links or chains, or an end point of a link or chain.
Node, Topology Level 0 -- VPF term for a point (in SDTS, a "point").
Node, Topology Level 1 -- VPF term for a node on a network (in SDTS, a
"node, network").
Node, Topology Level 2 -- VPF term for a node on a planar graph (in SDTS, a
"node, planar graph").
Node, Topology Level 3 -- VPF term for a point used to represent isolated
features. These are topologically linked to a containing face.
object -- a digital representation of all or part of an entity instance.
ordinate -- the coordinate of a point in a plane cartesian coordinate system
obtained by measuring parallel to the y-axis ("the 'y' value").
phenomenon -- a fact, occurrence or circumstance. Route 10, George
Washington National Forest, and Chesterfield County are all phenomena.
pixel -- two-dimensional picture element that is the smallest nondivisible
element of a digital image.
planar graph -- the node and link or chain objects of the graph occur or can be
represented as though they occur upon a planar surface. Not more than one
node may exist at any given point on the surface. Links or chains may only
intersect at nodes.
point -- a zero-dimensional object that specifies geometric location. One
coordinate pair or triplet specifies the location. Area point, entity point, and
label point are special implementations of the general case.
primitive -- the quality of not being subdivided; atomic.
quality -- an essential or distinguishing characteristic necessary for car-
tographic data to be fit for use.
raster -- one or more overlapping layers for the same grid or digital image.
raster object - one or more images and/or grids, each grid or image representing
a layer, such that corresponding grid cells and/or pixels between layers are
congruent and registered.
resolution -- the minimum difference between two independently measured or
computed values which can be distinguished by the measurement or analytical
method being considered or used.
ring -- sequence of nonintersecting chains or strings and (or) arcs, with closure.
A ring represents a closed boundary, but not the interior area inside the closed
boundary.
SDTS -- the Spatial Data Transfer Standard defined by Department of
Commerce, 1992, Spatial Data Transfer Standard (SDTS) (Federal Information
Processing Standard 173): Washington, Department of Commerce, National
Institute of Standards and Technology.
spatial data -- see geospatial data.
stratum -- one of a series of layers, levels, or gradations in an ordered system.
For this standard, the term is used in the sense of (1) a region of sea,
atmosphere, or geology that is distinguished by natural or arbitrary limits; (2) a
socioeconomic level of society comprised of persons of the same or similar
status, especially with regard to education or culture; or (3) a layer of
vegetation, usually of the same or similar height.
string -- a connected nonbranching sequence of line segments specified as the
ordered sequence of points between those line segments. Note: A string may
intersect itself or other strings.
two-dimensional manifold -- a planar graph and its associated two dimensional
objects. Each chain bounds two and only two, not necessarily distinct, GT-
polygons. The GT-polygons are mutually exclusive and completely exhaust the
surface.
type -- in the definition of the elements in the metadata standard, a compound
element has the type "compound" to provide a unique way to identify
compound elements. For a data element, the type identifies the kind of value
that can be assigned to the data element. The choices are "integer" for integer
numbers, "real" for real numbers, "text" for ASCII characters, "date" for day of
the year, and "time" for time of the day.
universe polygon -- defines the part of the universe that is outside the perimeter
of the area covered by other GT-polygons ("covered area") and completes the
two-dimensional manifold. This polygon completes the adjacency relationships
of the perimeter links. The boundary of the universe polygon is represented by
one or more inner rings and no outer ring. Attribution of the universe polygon
may not exist, or may be substantially different from the attribution of the
covered area.
vector -- composed of directed lines.
vertical -- at right angles to the horizontal; includes altitude and depth.
VPF -- the Vector Product Format defined by Department of Defense, 1992,
Vector Product Format (MIL-STD-600006): Philadelphia, Department of
Defense, Defense Printing Service Detachment Office.
void polygon -- defines a part of the two-dimensional manifold that is bounded
by other GT-polygons, but otherwise has the same characteristics as the
universe polygon. The geometry and topology of a void polygon are those of a
GT-polygon. Attribution of a void polygon may not exist, or may be
substantially different from the attribution of the covered area.
voxel -- a three-dimensional element that is the smallest nondivisible element
of a digital volume.
Abscissa Resolution 29
Abstract 4
Access Constraints 7
Access Instructions 41
Address 52
Address Type 52
Albers Conical Equal Area 24
Altitude Datum Name 31
Altitude Distance Units 31
Altitude Encoding Method 31
Altitude Resolution 31
Altitude System Definition 31
ARC Coordinate System 28
ARC System Zone Identifier 28
Attribute 34
Attribute Accuracy 10
Attribute Accuracy Explanation
10
Attribute Accuracy Report 10
Attribute Accuracy Value 10
Attribute Definition 34
Attribute Definition Source 34
Attribute Domain Values 34
Attribute Label 34
Attribute Measurement Frequency
36
Attribute Measurement Resolution
35
Attribute Units of Measurement
35
Attribute Value Accuracy 36
Attribute Value Accuracy
Explanation 36
Attribute Value Accuracy
Information 36
Available Time Period 43
Azimuth Measure Point Longitude
26
Azimuthal Angle 26
Azimuthal Equidistant 24
Bearing Reference Direction 30
Bearing Reference Meridian 30
Bearing Resolution 30
Bearing Units 30
Beginning Date 49
Beginning Date of Attribute
Values 35
Beginning Time 49
Bounding Coordinates 5
Browse Graphic 7
Browse Graphic File Description 8
Browse Graphic File Name 7
Browse Graphic File Type 8
Calendar Date 49
Citation 4
Citation Information 47
City 52
Cloud Cover 13
Codeset Domain 35
Codeset Name 35
Codeset Source 35
Column Count 17
Compatibility Information 42
Completeness Report 10
Compression Support 41
Computer Contact Information 40
Contact Address 52
Contact Electronic Mail Address
52
Contact Facsimile Telephone 52
Contact Information 51
Contact Instructions 53
Contact Organization 51
Contact Organization Primary 51
Contact Person 51
Contact Person Primary 51
Contact Position 52
Contact TDD/TTY Telephone 52
Contact Voice Telephone 52
Coordinate Representation 29
Country 52
Cross Reference 8
Currentness Reference 5
Custom Order Process 43
Data Quality Information 9
Data Set Credit 8
Data Set G-Polygon 6
Data Set G-Polygon Exclusion G-
Ring 6
Data Set G-Polygon Outer G-Ring
6
Denominator of Flattening Ratio
31
Depth Datum Name 31
Depth Distance Units 32
Depth Encoding Method 32
Depth Resolution 32
Depth System Definition 31
Description 4
Detailed Description 34
Dialup File Name 41
Dialup Instructions 41
Dialup Telephone 41
Digital Form 38
Digital Transfer Information 38
Digital Transfer Option 40
Direct Spatial Reference Method
15
Distance and Bearing
Representation 29
Distance Resolution 30
Distribution Information 37
Distribution Liability 38
Distributor 38
East Bounding Coordinate 5
Edition 48
Ellipsoid Name 31
Ending Date 50
Ending Date of Attribute Values
36
Ending Time 50
Entity and Attribute Detail
Citation 36
Entity and Attribute Information
33
Entity and Attribute Overview 36
Entity Type 34
Entity Type Definition 34
Entity Type Definition Source 34
Entity Type Label 34
Enumerated Domain 34
Enumerated Domain Value 34
Enumerated Domain Value
Definition 35
Enumerated Domain Value
Definition Source 35
Equidistant Conic 24
Equirectangular 24
False Easting 25
False Northing 25
Fees 42
File Decompression Technique 40
Format Information Content 40
Format Name 39
Format Specification 40
Format Version Date 40
Format Version Number 40
G-Ring Latitude 6
G-Ring Longitude 6
General Vertical Near-sided
Projection 24
Geodetic Model 30
Geographic 23
Geographic Coordinate Units 24
Geospatial Data Presentation Form
48
Gnomomic 24
Grid Coordinate System 27
Grid Coordinate System Name 27
Height of Perspective Point Above
Surface 25
Highest BPS 41
Horizontal Coordinate System
Definition 23
Horizontal Datum Name 30
Horizontal Positional Accuracy 11
Horizontal Positional Accuracy
Explanation 11
Horizontal Positional Accuracy
Report 11
Horizontal Positional Accuracy
Value 11
Hours of Service 52
Identification Information 3
Indirect Spatial Reference 15
Issue Identification 48
Keywords 6
Lambert Azimuthal Equal Area 24
Lambert Conformal Conic 24
Landsat Number 27
Larger Work Citation 48
Latitude of Projection Center 26
Latitude of Projection Origin 25
Latitude Resolution 24
Lineage 12
Local 30
Local Description 30
Local Georeference Information
30
Local Planar 29
Local Planar Description 29
Local Planar Georeference
Information 29
Logical Consistency Report 10
Longitude of Central Meridian 25
Longitude of Projection Center 25
Longitude Resolution 24
Lowest BPS 41
Maintenance and Update
Frequency 5
Map Projection 24
Map Projection Name 24
Mercator 24
Metadata 1
Metadata Access Constraints 46
Metadata Contact 45
Metadata Date 45
Metadata Future Review Date 45
Metadata Reference Information
45
Metadata Review Date 45
Metadata Security Classification
46
Metadata Security Classification
System 46
Metadata Security Handling
Description 46
Metadata Security Information 46
Metadata Standard Name 45
Metadata Standard Version 45
Metadata Time Convention 46
Metadata Use Constraints 46
Miller Cylindrical 24
Modified Stereographic for Alaska
24
Multiple Dates/Times 49
Native Data Set Environment 8
Network Address 40
Network Resource Name 41
Non-digital Form 38
North Bounding Coordinate 5
Number DataBits 41
Number StopBits 41
Oblique Line Azimuth 26
Oblique Line Latitude 26
Oblique Line Longitude 26
Oblique Line Point 26
Oblique Mercator 24
Offline Media 42
Offline Option 42
Online Computer and Operating
System 42
Online Linkage 48
Online Option 40
Ordering Instructions 42
Ordinate Resolution 29
Originator 47
Orthographic 24
Other Citation Details 48
Other Grid System's Definition 29
Other Projection's Definition 27
Overview Description 36
Parity 41
Path Number 27
Place 6
Place Keyword 7
Place Keyword Thesaurus 6
Planar 24
Planar Coordinate Encoding
Method 29
Planar Coordinate Information 29
Planar Distance Units 30
Point and Vector Object Count 16
Point and Vector Object
Information 15
Point of Contact 7
Polar Stereographic 24
Polyconic 24
Positional Accuracy 11
Postal Code 52
Process Contact 13
Process Date 13
Process Description 12
Process Step 12
Process Time 13
Progress 5
Publication Date 47
Publication Information 48
Publication Place 48
Publication Time 47
Publisher 48
Purpose 4
Quantitative Attribute Accuracy
Assessment 10
Quantitative Horizontal Positional
Accuracy
Assessment 11
Quantitative Vertical Positional
Accuracy
Assessment 11
Range Domain 35
Range Domain Maximum 35
Range Domain Minimum 35
Range of Dates/Times 49
Raster Object Information 17
Raster Object Type 17
Recording Capacity 42
Recording Density 42
Recording Density Units 42
Recording Format 42
Resource Description 38
Robinson 24
Row Count 17
Scale Factor at Center Line 26
Scale Factor at Central Meridian
27
Scale Factor at Equator 25
Scale Factor at Projection Origin
26
SDTS Point and Vector Object
Type 16
SDTS Terms Description 15
Security Classification 8
Security Classification System 8
Security Handling Description 8
Security Information 8
Semi-major Axis 31
Series Information 48
Series Name 48
Single Date/Time 49
Sinusoidal 24
Source Citation 12
Source Citation Abbreviation 12
Source Contribution 12
Source Currentness Reference 12
Source Information 12
Source Produced Citation
Abbreviation 13
Source Scale Denominator 12
Source Time Period of Content 12
Source Used Citation Abbreviation
13
South Bounding Coordinate 6
Space Oblique Mercator (Landsat)
24
Spatial Data Organization
Information 15
Spatial Domain 5
Spatial Reference Information 19
SPCS Zone Identifier 28
Standard Order Process 38
Standard Parallel 25
State or Province 52
State Plane Coordinate System 28
Status 5
Stereographic 24
Straight Vertical Longitude from
Pole 26
Stratum 7
Stratum Keyword 7
Stratum Keyword Thesaurus 7
Supplemental Information 5
Technical Prerequisites 43
Temporal 7
Temporal Keyword 7
Temporal Keyword Thesaurus 7
Theme 6
Theme Keyword 6
Theme Keyword Thesaurus 6
Time of Day 49
Time Period Information 49
Time Period of Content 5
Title 47
Transfer Size 40
Transverse Mercator 24
Turnaround 42
Type of Source Media 12
Universal Polar Stereographic 28
Universal Transverse Mercator 27
Unrepresentable Domain 35
UPS Zone Identifier 28
Use Constraints 7
UTM Zone Number 28
van der Grinten 24
Vertical Coordinate System
Definition 31
Vertical Count 17
Vertical Positional Accuracy 11
Vertical Positional Accuracy
Explanation 11
Vertical Positional Accuracy
Report 11
Vertical Positional Accuracy Value
11
VPF Point and Vector Object Type
16
VPF Terms Description 16
VPF Topology Level 16
West Bounding Coordinate 5
American Congress on Surveying and Mapping and American Society of Civil
Engineering, 1978, Definitions of surveying and associated terms: Falls
Church, Virginia, American Congress on Surveying and Mapping.
American National Standards Institute, 1975, Representations of universal
time, local time differentials, and United States time zone reference for
information interchange (ANSI X3.51-1975): New York, American National
Standards Institute.
American National Standards Institute, 1986, Representation for calendar date
and ordinal date for information interchange (ANSI X3.30-1985): New York,
American National Standards Institute.
American National Standards Institute, 1986, Representations of local time of
day for information interchange (ANSI X3.43-1986): New York, American
National Standards Institute.
American National Standards Institute, 1990, Dictionary for information
systems (ANSI X3.172-1990): New York, American National Standards
Institute.
Anglo-American Committee on Cataloguing of Cartographic Materials, 1982,
Cartographic materials: A manual of interpretation for AACR2: Chicago,
American Library Association.
ASTM Section D18.01.05, various dates, Spatial metadata content standards
for geographic information systems, catalogs, and data exchange (drafts).
Clark, Suzanne, Larsgaard, Mary, and Teague, Cynthia, 1992, Cartographic
citations: A style guide: Chicago, American Library Association, Map and
Geography Roundtable.
Cogan, Christopher, and Edwards, Thomas, Jr., 1994 (February), Metadata
standards for Gap analysis: Moscow, Idaho, Idaho Cooperative Fish and
Wildlife Research Unit, University of Idaho.
Department of Commerce, 1986, Representation of geographic point locations
for information interchange (Federal Information Processing Standard 70-1):
Washington, Department of Commerce, National Institute of Standards and
Technology.
Department of Commerce, 1989 (January), State Plane Coordinate System of
1983 (National Oceanic and Atmospheric Administration Manual NOS NGS
5): Silver Spring, Maryland, Department of Commerce, National Oceanic and
Atmospheric Administration, National Ocean Service, Coast and Geodetic
Survey.
Department of Commerce, 1992, Spatial Data Transfer Standard (SDTS)
(Federal Information Processing Standard 173): Washington, Department of
Commerce, National Institute of Standards and Technology.
Department of Defense, 1981, Glossary of mapping, charting, and geodetic
terms (4th ed.): Washington, Department of Defense, Defense Mapping
Agency.
Department of Defense, 1990, Military specification ARC Digitized Raster
Graphics (ADRG) (MIL-A-89007): Philadelphia, Department of Defense,
Defense Printing Service Detachment Office.
Department of Defense, 1992, Vector Product Format (MIL-STD-600006):
Philadelphia, Department of Defense, Defense Printing Service Detachment
Office.
Dodd, Susan, 1982, Cataloging machine-readable data files: Chicago,
American Library Association.
Hansen, Wallace, 1991, Suggestions to authors of the reports of the United
States Geological Survey (7th ed.): Washington, U.S. Government Printing
Office.
Li, Xia, and Crane, Nancy, 1993, Electronic style: A guide to citing electronic
information: Westport, Connecticut, Meckler Publishing.
Network Development and MARC Standards Office, 1988, USMARC format
for bibliographic data: Washington, Library of Congress, Cataloging
Distribution Service.
Network Development and MARC Standards Office, 1988, USMARC code list
for relators, sources, and description conventions: Washington, Library of
Congress, Cataloging Distribution Service.
(no author), 1994, The Government Information Locator Service (GILS):
Report to the Information Infrastructure Task Force (May 2, 1994).
Patrias, Karen, 1991 (April), National Library of Medicine recommended
formats for bibliographic citations: Bethesda, Maryland, U.S. Department of
Health and Human Services, Public Health Service, National Institutes of
Health, National Library of Medicine.
Synder, John, 1987, Map projections: A working manual (U.S. Geological
Survey Professional Paper 1395): Washington, U.S. Government Printing
Office.
Westbrook, J. H., and Grattidge, W., 1991, A glossary of terms relating to data,
data capture, data manipulation, and data bases: CODATA Bulletin, v. 23, no.
1-2.
-formerly the American Society for Testing and Materials.
-The variety of means of organizing data in a computer, the differences
among data providers to describe their data holdings because of varying
institutional and technical capabilities, the rapid evolution of means to provide
information through the Internet for different purposes, and the need to
accommodate existing standards have guided the evolution of this decision.
The FGDC is pursuing several implementation methods.
-Reference information on these map projections and their parameters can be
found in Synder, John, 1987, Map projections: a working manual (U.S.
Geological Survey Professional Paper 1395): Washington, U.S. Government
Printing Office.
Federal Geographic Data Committee
Department of Agriculture Department of Commerce Department of Defense
Department of Energy
Department of Housing and Urban Development Department of the Interior
Department of State
Department of Transportation Environmental Protection Agency
Federal Emergency Management Agency Library of Congress
National Aeronautics and Space Administration National Archives and
Records Administration
Tennessee Valley Authority
Content Standards for Digital Geospatial Metadata xvii June 8, 1994
Content Standards for Digital Geospatial Metadata 17 June 8, 1994
Content Standards for Digital Geospatial Metadata A-1 June 8, 1994
Content Standards for Digital Geospatial Metadata B-1 June 8, 1994
Content Standards for Digital Geospatial Metadata C-1 June 8, 1994