NLCD Percent Developed Impervious Surface

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The National Land Cover Database (NLCD) Percent Developed Impervious surface provides nationally consistent estimates of the amount of man-made impervious surfaces present over a given area in a seamless form. These raster data sets are derived from Landsat satellite imagery, using classification and regression tree analysis. Values range from 0 to 100 percent, indicating the degree to whic­h the area is covered by impervious features.

Data Specifications

  • Area of Coverage: Continental U.S., Puerto Rico, Hawaii, and portions of Alaska
  • Dates Available: 2001 and 2006
  • Format: IMG, ArcGRID, GeoTiff, BIL
  • Resolution/Scale: 30 meter pixels (1:100,000)
  • Minimal Mapping Unit: 30 meter pixels (.25 acres)
  • Accuracy: Varies by location; consult metadata files for specifics on each project area


  • Contributes to the Earth Cover layer of the National Spatial Data Infrastructure (NSDI).
  • Produced through documented, repeatable procedures using standard data sources and quality assurance review procedures
  • Produced through a multiagency coordinated effort, resulting in one consistent and comprehensive national land cover product

Notes and Limitations: Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty. Data may have been compiled from various outside sources. Spatial information may not meet National Map Accuracy Standards. This information may be updated without notification. The USGS shall not be liable for any activity involving these data or their installation, fitness for a particular purpose, use, or analyses results.

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