Source: https://data.cityofchicago.org/Buildings/Building-Footprints-current-/hz9b-7nh8

Source: https://travel.stage.gov/content/travel/en/traveladvisories/traveladvisories/mexico-travel-advisory.html

Source: NASA Earth Science Data and Information System (ESDIS), https://dwtkns.com/srtm30m/