greenspace

degauss/greenspace

DeGAUSS container that calculates average greenness within 500 m, 1500 m, and 2500 m buffers

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DeGAUSS example call

If my_address_file_geocoded.csv is a file in the current working directory with coordinate columns named lat and lon, then

docker run --rm -v $PWD:/tmp degauss/greenspace:0.2 my_address_file_geocoded.csv

will produce my_address_file_geocoded_greenspace.csv with three added columns named evi_500, evi_1500, and evi_2500.

geomarker methods

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.

Residential greenspace is estimated by averaging EVI values within 500, 1500, and 2500 m of each geocoded address.

geomarker data

To create the EVI raster, individual tiles were downloaded from the LP DAAC MOD13Q1 product and combined using the {MODIS} R package. Then the raster was clipped and masked to the contiguous United States boundaries.

The raster file needed to build this container can be downloaded here.

DeGAUSS details

For detailed documentation on DeGAUSS, including general usage and installation, please see the DeGAUSS README.