We used the 1:50,000 municipal boundary layer from the Cartographic and Geological Institute of Catalonia (ICGC). In cases where agricultural parks have their own boundaries, we used those.

Data sources:

• To determine current land usage, we cross-referenced with the 2018 ICGC Coverage Map
• Open data from the DUN agrarian declaration at municipal level for the DUN Holders and Openfields section, provided by Coverage records
• Population data from the Institute of Statistics of Catalonia (IDESCAT) 
• Organically cultivated municipal area data from Organic agricultural production records

It's important to note that the calculation of agrarian surface area includes both cropland and forestry, and was determined using ICGC's coverage map. For agrarian parks with their own boundaries, we used those for the calculation. Other data such as crop types, population, ecological information, etc., were compiled at the municipal level.