THE IGBP-DIS GLOBAL 1 KM LAND-COVER DATA SET, DISCOVER - FIRST RESULTS

The International Geosphere-Biosphere Programme Data and Information S ystem (IGBP-DIS) is co-ordinating the development of global land data sets from Advanced Very High Resolution Radiometer (AVHRR) data. The f irst is a 1 km spatial resolution land cover product 'DISCover', based on monthly Normalized Difference Vegetation Index composites from 199 2 and 1993. DISCover is a 17 class land cover dataset based on the sci ence requirements of IGBP elements. Mapping uses unsupervised classifi cation with post-classification refinement using ancillary data. Draft Africa, North America and South America products are now available fo r peer review.