Geographic Data =============== For Geographic datafiles, You can add a Datafile.Projection property to set the projection. If it specifies a particular projection, it must be an EPSG value, prefixed with 'epsg:', such as: 'epsg:4269'. If this projection is different than the soruce, the data will be projected while it is loaded. The value can also be specified as '", in which case the data will not be projected, and the `Datafile.Projection` value will be replaced with the source projection code in built packages. THe property will be added to the Datafile term if it does not exist.