p-codes Managing Geographical codes in version control (experimental) See reference here: https://help.github.com/articles/mapping-geojson-files-on-github http://blog.okfn.org/2013/07/02/git-and-github-for-data/ http://blog.geomusings.com/2013/06/18/geojson-on-github-now-what/ http://geojson.io