stedy / US-congressional_district_maps

base64 HTML maps and geojson files for all US Congressional districts

This is a repository of HTML files for mapping every US Congressional District

Input

The main R script, make_CD_map.R downloads shapefiles of US Congressional Districts for the current Congress (at this time the 115th Congress) from the US Census Bureau website.

Output

For each Congressional District there are two files generated:

• A base64 encoded Leaflet map. This is generated as a 100% <div> with maps from OpenStreetMap

• A geoJSON file created with geojson.io using WGS84 coordinates

Both of these outputs can be styled with different base maps or use different coordinate systems as desired.

Examples

For example, I live in WA-09 and here is the corresponding HTML map:

WA-09 HTML

And the geoJSON file:

WA-09 geoJSON