The City of Chicago's open data portal, a pioneering municipal program with extensive geospatial and operational datasets.
The Chicago Data Portal is the City of Chicago's open data platform, an early and influential municipal open data program. It publishes operational and geographic data from city departments on a Socrata system.
For mapping it offers boundaries (community areas, wards, census tracts), building footprints, transportation, crime, 311 requests, and many service datasets, exportable as GeoJSON and Shapefile with full APIs. It is the authoritative source for Chicago city data.
Community areas, wards, census tracts, building footprints, streets, transit, and many service-location datasets for Chicago.
Yes. The Socrata-based portal provides APIs for every dataset, with GeoJSON export for spatial data.
Yes. The City of Chicago publishes the data for free public use.
South Korea's national spatial data platform, providing authoritative base maps, 3D data, and geospatial APIs.
Hawaii's statewide GIS program, providing authoritative geospatial data for the islands including boundaries, imagery, and coastal data.
Japan's national mapping agency, providing authoritative topographic maps, elevation, aerial imagery, and the GSI Tiles base mapping service.
France's national mapping agency portal, providing authoritative reference geographies, imagery, and topographic data through downloads and OGC services.
Missouri's state open data portal, publishing agency datasets including transportation, health, and administrative geography.
Michigan's statewide GIS open data hub, providing authoritative boundaries, transportation, environment, and imagery layers.
Iowa's statewide geospatial data hub, providing authoritative boundaries, imagery, elevation, and infrastructure layers.
Kentucky's statewide GIS clearinghouse, providing authoritative geospatial data including imagery, elevation, and boundaries.
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