In Data News, 2019-12-04
This layer shows the percentage of land area covered by tree canopy based on data from the 2016 The National Land Cover Database (NLCD) Percent Tree Canopy Collection. The NLCD tree canopy imagery is a product of the U.S. Forest Service (USFS), and is produced through a cooperative project conducted by the Multi-Resolution Land Characteristics (MRLC) Consortium (www.mrlc.gov). Tree canopy values range from 0 to 100 percent.
In order to generate percent tree canopy values for census geographies, the NLCD 2016 Percent Tree Canopy Analytical Dataset was processed using ESRI Zonal Statistics tools. Zones were based on US Census Block Group boundaries from the ESRI Map Data pack for ArcGIS 10.6. These figures were aggregated and mapped at the census block group, census tract and county levels. Census tract and county figures are also available as population weighted percentages based on 2010 Decennial Census figures.