chicago zoning map - SERP Analysis

https://gisapps.chicago.gov/ZoningMapWeb/

https://www.chicago.gov/city/en/depts/dcd/provdrs/admin/news/2017/january/city-launches-new-online-zoning-map.html

https://secondcityzoning.org/

https://www.chicago.gov/city/en/depts/bacp/supp_info/zoning.html

https://data.cityofchicago.org/d/7cve-jgbp

https://codelibrary.amlegal.com/codes/chicago/latest/chicagozoning_il/0-0-0-48750