Starting in 1999, new research was undertaken to expand and update NLCD 1992 into a full scale land cover database (with multiple instead of single products), and to produce it across all 50 states and Puerto Rico (Homer et al. 2004). This new database is called the National Land Cover Database 2001 (the 2001 refers to the nominal year from which most of the Landsat 5 and Landsat 7 imagery was acquired) and has been under production for 6 years. ...
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Starting in 1999, new research was undertaken to expand and update NLCD 1992 into a full scale land cover database (with multiple instead of single products), and to produce it across all 50 states and Puerto Rico (Homer et al. 2004). This new database is called the National Land Cover Database 2001 (the 2001 refers to the nominal year from which most of the Landsat 5 and Landsat 7 imagery was acquired) and has been under production for 6 years. This article announces the completion of NLCD 2001 for the conterminous United States, with products that can identify one of 16 classes of land cover, the percent tree canopy, and the percent urban imperviousness for every 30-meter cell in the conterminous 48 states (approximately 27 billion cells).
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