|100-Meter Resolution Impervious Surface of the United States
What this map layer shows:
Impervious surface, such as pavement, as seen by satellite and expressed as a percentage of each 100-meter pixel. This map layer is comprised of four separate Impervious Surface files for the conterminous United States, Alaska, Hawaii, and Puerto Rico and the U.S. Virgin Islands.
The full Land Cover map layer used to generate Impervious Surface is also available.
Land cover data describe the nature of the land surface at a particular
location. The staff at the U.S.
Geological Survey (USGS), National
Center for Earth Resources Observation and Science (EROS) compile land cover
data as part of the USGS
Land Cover Characterization Program (LCCP).
The LCCP was started in 1995 to address National and International requirements
for land cover data that were becoming increasingly sophisticated and
diverse. The program develops multi-scale land cover characteristics
databases; studies the patterns, characteristics, and dynamics of land
cover across the Nation and the Earth; pursues research that improves
the utility and efficiency of large-area land cover characterization
and land cover characteristics databases; and serves as a central facility
for access to, or information about, land cover data.
Land cover data are used for a wide variety of global, national, and
regional applications, including global change research, environmental
inventories, watershed management, and land use planning.
The USGS, in cooperation with the U.S.
Environmental Protection Agency,
National Oceanic and Atmospheric
Administration, and the U.S.
Forest Service, has produced a land cover data set for the conterminous
United States, derived from 2001 Landsat
thematic mapper imagery and supplemental
data. This National
Land Cover Database 2001 (NLCD) is a component of the
LCCP. The seamless NLCD contains 21 categories of land cover information
based on a modified
Anderson land cover classification, and has been
subjected to a rigorous accuracy assessment. Further information on
collection and accuracy assessment procedures can be found on the National
Land Cover Data: Mapping Procedures page.
map layer is an image showing the Impervious Surface of the United States as a percentage of each 100-meter pixel.
The National Atlas also includes a 1 kilometer resolution image showing
general North American Land Cover Characteristics, with classification
based on the Anderson
The 100-Meter Resolution Impervious Surface of the United States map layer was prepared by the National Atlas of the United States and is delivered in the Albers Equal-Area Conic map projection. This map layer is part of our collection of fundamental digital cartographic data known as 1. This collection includes base map data in vector format at 1:1,000,000-scale and in image format at 100-meter ground resolution. Read more about the 1.