NLCD Percent Developed Impervious Surface
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
Overview
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.