By observing the various kinds of crops, it is possible to map the boundaries of the fields.
Mapping of the boundaries of land parcels provides information for the creation of cadastral maps.
Cadastral maps are usually in a vector format and in this form can be used in a GIS system, along with other types of data.
These can be used by the local and national authorities, to estimate how much land is used for agriculture, and how much area is used for the cultivation of each crop.