Data Format
Each state- and county-level dataset is available for downloading in a single, compressed tar
archive file (*.tar.gz).
Datasets consists of three land cover images in band-sequential (BSQ)
format (*.bsq), associated image colormap files (*.clr), ESRI-format projection files (*.prj),
and image classification summary statistics files (*.txt).
Land cover images are in the Albers Equal Area projection, using the North American Datum
of 1983 (NAD83).
The National Land Cover Pattern Database was originally
produced in state-wide coverage. A subset
of the state-level data is available here for
portions of
Federal Region III, which includes
the states of Delaware, Maryland,
Pennsylvania, Virginia, and West Virginia.
The District of Columbia (Washington D.C.)
is currently not available from this website.
County polygons were derived from 1998 U.S. Bureau of Census 1:100,000 TIGER/Line
data. Individual county polygons were buffered by 1000-m, then used as clipping
boundaries to produce a county-level land cover
images from the original state-level land cover image.
Virginia independant cities were merged with adjacent counties prior to
buffering and clipping.
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