In order to produce the best global cropland map, the fittest existing cropland map at country level was identified by means of a multi-criteria analysis. Four criteria were selected to evaluate the fitness of a cropland map: the adequacy of the legend, the spatial resolution, the timeliness and the confidence level. Those fittest maps were resampled at 250 meters in a reference grid with an average resampling method and then joined spatially in order to form the Unified Cropland Layer. The current version is for the year 2014.
Funding
This research was conducted in the framework of the SIGMA (Stimulating Innovation for Global Monitoring of Agriculture and its Impact on the Environment in support of GEOGLAM) project funded by the European Commission in the Seventh Programme for research