Chicago Election Results by Precinct

Simple elections results chloropleth for the web, using javascript, OpenStreetMap, and LeafLet.

View on GitHub Pages.

Clone me.

1. Download Election Results in spreadsheet format as dataexport.xls from the Chicago Board of Election Commissioners (current as of offical results).
2. Download precinct and (optionally) ward boundaries as GeoJSON from the City of Chicago Data Portal
3. Run scripts to trim the Chicago geojson.
   1. precincts.mjs
   2. wards.mjs
4. Use LibreOffice Calc or equivalent to export the results as a comma separated values (*.csv).
5. Run script extendPrecincts.mjs to merge the CSV data into the precinct GeoJSON properties.
6. Customize
   1. the color palette in docs/palette.mjs and the tests in test/TestPalette.mjs
   2. the precinct coloring and the legend in docs/app.mjs

Resources

• More on GitHub Pages
• Markdown Cheat Sheet
• Mocha JavaScript test framework