This R code generates the Hamilton County Land Cover and Built Environment (hamilton_landcover) data resource. Census tract-level measures of greenness, imperviousness, and treecanopy are derived from the National Land Cover Database (NLCD) and NASA MODIS satellite data.
See metadata.md for detailed metadata and schema information.
Read this CSV file into R directly from the release with:
readr::read_csv("https://github.com/geomarker-io/hamilton_landcover/releases/download/v0.1.0/hamilton_landcover.csv")
Metadata can be imported from the accompanying tabular-data-resource.yaml file by using {CODECtools}.
A grid cell is considered greenspace if its NLCD land cover classification is in any category except water, ice/snow, developed medium intensity, developed high intensity, rock/sand/clay.
The Enhanced Vegetation Index (EVI) is a measure of greenness that ranges from -0.2 to 1, with higher values corresponding to more vegetation. A cloud-free composite EVI raster at a resolution of 250 × 250 m was created by assembling individual images collected via remote sensing between June 10 and June 25, 2018.