Chicago wards and precincts (effective 2015)
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etl
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README.md
chicago_2015_precincts.dbf
chicago_2015_precincts.json
chicago_2015_precincts.kml
chicago_2015_precincts.prj
chicago_2015_precincts.shp
chicago_2015_precincts.shx
chicago_2015_precincts.zip
chicago_2015_precincts_topo.json
chicago_2015_wards.dbf
chicago_2015_wards.json
chicago_2015_wards.kml
chicago_2015_wards.prj
chicago_2015_wards.shp
chicago_2015_wards.shx
chicago_2015_wards.zip
chicago_2015_wards_precincts.sql
chicago_2015_wards_precincts.sql.gz
chicago_2015_wards_topo.json

README.md

Chicago wards and precincts shapefiles

These Chicago wards and precincts boundary shapefiles are effective as of 2015. As of Thursday, February 26, 2015, the shapefiles on the City of Chicago’s data portal are stale—they are the boundaries from before the city council voted to redraw them in 2012.

Source

The original source material was provided by the Chicago Board of Elections in response to a FOIA request, in the form of 50 shapefiles corresponding to precinct boundaries and attributes in each Chicago ward.

I applied minimal post-processing to produce various formats, and to generate ward boundaries by aggregating precincts and unioning their geometries. See the etl directory for the programs that perform the processing.

Contact

Email Paul Smith with questions or comments: paulsmith@pobox.com