SIGPAC is the Agricultural Parcel Identification System implemented throughout the European Union for the application of CAP (Common Agricultural Policy) aid to farmers and ranchers

For its elaboration, aerial photography has been used as a basis, on which the cadastral data have been adjusted. 
Although SIGPAC was initially conceived with the purpose of making it easier for farmers to submit aid applications, as well as controls and on-the-spot inspections carried out by the Administration, over time it has become a a very useful tool in other areas (urban planning, infrastructure, geology, hydrology, etc.).