District differences: relative average differences between the cumulative vegetation indices for the year 2009 for the month of May and those for the historical average, by agricultural district
Description
The data set of regional differences for the year 2009 of the month of May in the study of Monitoring of the Annual Evolution of Crops and Harvesting contains the map of relative average differences of the accumulated vegetation indices of the year 2009 and those of the historical average, by agricultural region.
To obtain these results, the Ministry of Agriculture and Fisheries, Food and Environment (MAPAMA) has a system for monitoring the evolution of rainfed crops and grasslands, based mainly on the information provided by vegetation indices (NDVI) generated with daily satellite images NOAA-AVHRR. This system, which has been in operation since 1993, pays special attention to the detection and localization of drought situations throughout successive agricultural years, in order to provide for the measures that need to be taken to mitigate their effects. The system is in operation between the months of January and June, the period in which the studied crops are developed.
The study is carried out in the autonomous communities of Navarra, Aragón, Cataluña, Castilla y León, La Rioja, Madrid, Castilla-La Mancha, Comunidad Valenciana, Andalucía, Región Murciana, Extremadura and Baleares, as they comprise almost all rainfed crops and grasslands.