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Since 1992 (Townshend 1992) the Data ,Information System (DIS) or the International Geosphere-Biosphere Programme (IGBP) has been working towards the completion of a validated global land-cover dataset, (DISCover). The 1-km resolution dataset consists or seventeen cover classes identified on the basis of the science requirements of the IGBPs core projects. DISCover was created from Advanced Very High Resolution Radiometer (AVHRR) data. The data was processed and assembled into a coherent set of monthly Normalized Difference Vegetation Index (NDVI) composites (April 1992 to April 1993) and classified using unsupervised techniques with post-classification refinement. The first global land-cover Classification was completed in July 1997. The IGBP-DIS land Cover Working Group (LCWG) convened a validation working group to define and implement a validation method. This provides statistical statements concerning the accuracy of the global land-cover product and allows estimation of the error variance in aerial totals or classes globally and within regions. The validation workshop was completed in September 1998 and preliminary analysis concluded in March 1999. This chapter describes the process by which DISCover version 1.0 was created.

Additional information

Authors: BELWARD A, JRC-Space Applications Institute, Ispra (IT)
Bibliographic Reference: An article published in: Remote Sensing and Climate Change-The Role of Earh Observation. Published by: Springe-Praxis Books in Geophysical Sicence. Pp.225-234
Record Number: 200013747 / Last updated on: 2001-09-18
Original language: en
Available languages: en