CorrelationPoint relates a real world position to a particular grid cell, as specified by a series of grid coordinate values. For example, in 2-D they represent the row and column of the cell of interest in the grid. The location within the grid may be further refined by providing a value for locationInCell, such as nw or centre, for the northwest corner or the centre of the cell, respectively.
An instance of CorrelationPoint, a number of such instances, or an explicitly defined instance of geometricAggregate (consisting of such points) may be used as the basis of geometrically rectifying an instance of Grid (or Raster). This may be indicated by using the Control relationship.