Historic and current US Congressional districts as GeoJSON, versioned within Git

1. Select a state from the list above
2. Select a district
3. You will see the district boundaries for the 113th congress
4. Click history
5. Select a congress to compare changes in that district boundaries to the previous congress, if any

Files in this repository follow a predictable file structure and can be treated as a RESTful API.

Each district's geoJSON for the current year can be retrieved via ben.balter.com/congressional-districts/#{STATE}/#{DISTRICT}.geojson where STATE is the two character state postal code, and DISTRICT is the two digit congressional district number with leading 0s.

All data obtained from US Census Datasets, although I don't guarantee their accuracy.

script/build will download all the relevant datasets (if not already downloaded), unzip, convert from ESRI Shapefile to the open GeoJSON format, break into files/folders by state/district, and commit, amending the git history to reflect the day the congress took session.

MIT