Enhanced National Land Cover Data 1992 revised with 1990 and 2000 population data to indicate urban development between 1992 and 2000 (NLCDep0306)

This 30-meter resolution raster data set of land cover for the
conterminous United States ("NLCDep0306") was designed to
describe conditions representative of the year 2000 and is the
result of overlaying enhanced 1992 National Land Cover Data with
1990 and 2000 population data at the block group geographic
level. Any area (excluding water, developed land, or wetlands)
with population density of less than 1,000 people per square
mile in 1990 and at least 1,000 people per square mile in 2000
was reclassified as "newly urbanized" land in the derivative
product. Areas of water, developed land, or wetlands existing
in the original national land-cover data set were preserved.

This data set supersedes the one called "Enhanced National Land
Cover Data 1992 revised with 2000 population data to indicate
urban development between 1992 and 2000" ("NLCDep0905") dated
September 2005. NLCDep0905 coded any area having 2000 population
density of at least 1,000 people per square mile as being
recently urbanized and did not consider that the area could
already have been urbanized in 1990. The approach used in
developing NLCDep0905 was determined to have misclassified lands
that already were urban in 1990 as newly urbanized and therefore
overrepresented new urban land.