Centre for Ecology and Hydrology (CEH) Land Cover Map 2000 data are for use at the Network for Calibration And Validation of Earth Observations (NCAVEO) calibration/validation (cal/val) test sites for the illustration and explanation of processes involved in cal/val of earth observation data. The 5 UK test sites which have been identified as example cal/val sites are Barton Bendish, Chilbolton, Harwood Forest, Monks Wood and Thorney Island. The Land Cover Map datasets are available in 25 m derived raster format and Level 2 vector format.