Sidewalks in Chicago. To view or use these shapefiles, compression software, such as 7-Zip, and special GIS software, such as ESRI ArcGIS or QGIS, are required. To download this file, right-click the "Download" link above and choose "Save link as." Once unzipped, the .dbf file may be opened in any spreadsheet program, such as Microsoft Excel, and identifies the address associated with each sidewalk polygon where possible. Note this is a draft file and may be updated periodically.