ESA’s 2009 global land cover map was generated using 12 months worth of data, collected from 1 January-31 December 2009, from Envisat’s Medium Resolution Imaging Spectrometer (MERIS) instrument. GlobCover 2009 proves the sharpest possible global land cover map can be created within a year.
The map’s legend uses the UN Food and Agriculture Organisation’s Land Cover Classification System.