The user may define subclasses of this class.
The original data source has five components to describe data collection sources. A description of the field work may be given. A description of any maps used to help define the data may be provided, such as topographic, surficial geology, climate, and soils maps as input into an agricultural capability map. Information may also be given on any positioning systems or networks, aerial triangulation or remotely sensed (satellite or airborne) imagery which was used directly in the production of the current data. A list of agencies where the original data can be obtained, may also be given. General commentary may be provided.