Title: Highlighting continued uncertainty in global land cover maps to the user community
Authors: FRITZ SteffenSEE LindaMCCALLUM IanSCHILL ChristianOBERSTEINER MichaelVAN DER VELDE MarijnBOETTCHER HannesHAVLIK PetrACHARD Frederic
Citation: ENVIRONMENTAL RESEARCH LETTERS vol. 6 no. 4
Publisher: IOP PUBLISHING LTD
Publication Year: 2011
JRC N°: JRC67279
ISSN: 1748-9326
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC67279
DOI: 10.1088/1748-9326/6/4/044005
Type: Articles in Journals
Abstract: In the last 10 years a number of new global datasets have been created and new, more sophisticated algorithms have been designed to classify land cover. GlobCover and MODIS v.5 are the most recent global land cover products available, where GlobCover (300 m) has the finest spatial resolution of other comparable products such as MODIS v.5 (500 m) and GLC-2000 (1 km). This letter shows that the thematic accuracy in the cropland domain has decreased when comparing these two latest products. This disagreement is also evident spatially when examining maps of cropland and forest disagreement between GLC-2000, MODIS and GlobCover. The analysis highlights the continued uncertainty surrounding these products, with a combined forest and cropland disagreement of 893 Mha (GlobCover versus MODIS v.5). This letter suggests that data sharing efforts and the provision of more in situ data for training, calibration and validation are very important conditions for improving future global land cover products.
JRC Institute:Institute for Environment and Sustainability

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