This example shows data from Chicago's 2571 precincts (fifty wards) in the February 22,
2011 election. Included is our study of report envelopes from 226 precincts (four wards).
To view a map or Help, slide the cursor onto its name.
To view the background, slide the cursor onto this display panel.
To lock a map or Help into the background, slide the cursor onto the left side of its name.
Color code: Deepest tint equals "top of scale"--either 100% or else the highest vote tally.
To highlight how two maps differ, slide the cursor back and forth between their names.
The Atlas list contains area maps.
The Overlays list contains outline maps.
The Picks list contains copies of maps you've selected for comparison.
To copy a map onto the Picks list, click the map's name in the Atlas or Overlay list.
To remove a map from the Picks list, click the map's name in the Picks list.
To mark a map feature, click it. The marker stays in position when you switch maps.
To shrink a map to screen size, tap Ctrl-Minus once or twice. To reset, tap Ctrl-Zero.
To discuss an Atlas or Picks entry, first lock it, then click "Share Comments".
To discuss an overlay, or to offer feedback, or to get more tips, visit
MapElection is grateful to the following for their "priceless" contributions to this project:
Members and teammates of the Idaho State University Geospatial Software Lab, for
the freeware map-drawing application, MapWindow.
The City of Chicago and the State of Illinois, for the
The Chicago Board of Elections, for election statistics.
Ben Weaver and Chuck Goldstein, for excellent mentoring of this website's coding.
Disclaimer: Though we believe that the contents of this web page are accurate, no
warranty is provided. Use at your own risk. (If you do find errors, please let us know.)