R code to calculate land cover and tree canopy from National Land Cover Database (generated by the US Forest Service) for various shapefiles.
Pre-calculated values for Tree Canopy at the Zip Code Tabulation Area (ZCTA) are provided, as calculated from NLCD 2016 Tree Canopy and 2017 ZCTA using this code. If importing csv or opening in Excel, be sure to preserve leading zeros.
Source of Tree Canopy data: https://www.mrlc.gov/data/type/tree-canopy Source of shapefiles: https://www.census.gov/geographies/mapping-files/time-series/geo/tiger-line-file.2020.html