Yes. The data is from the US Census Bureau's American Community Survey: http://www.census.gov/data/developers/data-sets/acs-5year.html http://www.census.gov/dat

Yes. The data is from the US Census Bureau's American Community Survey: http://www.census.gov/data/developers/data-sets/acs-5year.html http://www.census.gov/data/developers/data-sets/acs-5year.ht... Here is the script to generate the GeoJSON file: https://github.com/davidbailey/py/blob/master/walkbike2015.py https://github.com/davidbailey/py/blob/master/walkbike2015.p... Thanks for the info about attribution. I've updated the page.