NLCD Percent Canopy Closure Surface
Data Specifications
- Area of Coverage: Continental U.S., Puerto Rico, Hawaii, and portions of Alaska
- Dates Available: 2001
- 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 Canopy Closure surface provides nationally consistent estimates of the amount of canopy closure present over a given area in a seamless form. These raster data sets are derived from Landsat satellite imagery, circa 2001, using Classification and Regression Tree analysis. Values range from 0 to 100 percent, indicating the degree to which the area is covered by tree canopy.