This page contains a collection of data sources for people who like data visualization and mapping. The list includes places where you can download shapefiles for use in GIS products, including ESRI’s ArcGIS suite.
I have not verified any of these datasets for accuracy – you should only trust your own verifications. That goes for spatial information sometimes included in the tables, like area, length, or geographic coordinates. Any GIS software will be able to recalculate these based on your preferred projection.
If you cannot find what you seek, contact me or leave a comment.
Looking for my list of tools? Transit data? Or my GIS portfolio?
Sources for static data (no APIs)
- Collections
- ESRI’s ArcGIS Open Data portal – Launched in 2015 by the GIS juggernaut this site seems to be the biggest collection of open (free to use) data from around the world
- Open Street Map’s potential data sources list
- University of Chicago’s links to other data sources
- Finding Data and Data Services – A research guide from the University of Illinois at Chicago (UIC) written by Maps and Data Services librarian Becky Lowery. She lists and annotates links that serve as official data sources on a variety of topics for data from around the world.
- Geography and GIS – Another research guide by Becky Lowery at UIC about geography, mapping, and computer resources.
- Websites for Digital GIS Data – A collection of links curated by the Stanford University Library. Has several links to Bay Area and California data, but has links to each State’s “data depot” and international data sources.
- NHGIS – Portal for Census data and Census boundaries. Has a “shopping cart” interface where you pick all the data you want (and it tells you which Census tables are available at which scale) and you check out. The site prepares your data and emails you when you can download it. The University of Minnesota runs the National Historical Geographical Information System.
- Transportation
- Amtrak Routes (KML) – Google Maps-compatible KML file (hosted as .xml) showing all Amtrak routes and stations. View in Google Maps. (via Hugh Stimson)
- Google Transit Feed – List of transit agencies that provide Google Transit Feed Specification (GTFS) data to the public. May be incomplete list, but includes major transit agencies like BART, CTA, Caltrain, Metrolink, and SEPTA. View an unaffiliated list.
- Los Angeles Metro bus routes, stops, and rail lines
- United States National Transportation Atlas – From the Bureau of Transportation Statistics. Includes vector (GIS) data on transit, county and state boundaries, airports, military installations, parks, and railroads.
- Various links – A list of links to other United States Government websites where you can download data.
- World
- United States
- Country
- GIS DataFinder (for University of North Carolina students only)
- Census shapefiles for the state of your choice (via ESRI) – Choose a state and then a dataset to retrieve shapefiles. Shapefiles do not include complete attribute tables – you can download the necessary data from the Census Bureau’s website and then join or relate the shapefile with the census data using the FIPS column as the common attribute field. You can also download the files straight from the Census Bureau.
- National Transportation Atlas – The U.S. Department of Transportation provides on information as diverse as the location of alternative fuel filling stations, hazardous material routes, as well as expected information like highways and rail transit lines.
- GeoData.gov – a government clearinghouse for data and maps. View interactive online maps.
- Find your Census block
- Metropolitan Planning Organizations (MPO) – From the U.S. Department of Transportation, a database of all the metropolitan planning organizations, formed to comply with federal law.
- Northwestern University’s United States GIS data page
- Census Reporter – Find basic demographic information for any jurisdiction in the United States using data from the 5-year American Community Survey.
- On The Map – Job flow data for all Americans by the United States Census Bureau. Find out where people who work in your city live.
- Colorado
- Colorado Governor’s Office of Information Technology – An enormous link collection to datasets produced by various State of Colorado agencies.
- Open Colorado – mega site for governmental data sets in myriad Colorado cities
- Illinois
- Chicago Metropolitan Agency for Planning (CMAP) maps of various Chicagoland areas
- Chicago historical boundaries from University of Chicago
- Chicago official data from City of Chicago
- Center for Neighborhood Technology’s GreenMapping project (includes data for Indiana and Wisconsin)
- Illinois historical aerial imagery
- Northwestern University’s Illinois GIS data page
- Chicago Data, a wiki site
- Chicago Transit Authority (CTA) shapefiles
- Metra stations and routes GIS shapefile (data from City of Chicago)
- Traffic counts: Chicago ADT traffic data – data from City of Chicago’s Traffic Tracker, prepared by me; alternate data source on the Chicago Open Data Portal; Illinois DOT map (with more recent data than Chicago’s Traffic Tracker)
- Chicago Crash Browser – pedestrian and bicycle crash map for Chicago
- Chicago pedestrian streets – This is a zoning attribute and requires that developers build with certain design and setback characteristics. It also prohibits car-oriented land uses and features like drive throughs with entrances on that street, banks, car repair shops, etc.
- How Chicago Commutes
- Chicagoland political boundaries map and API – Get tons of political, voting, planning & economic development, and tax boundary/district information for any place in Chicagoland.
- Massachusetts
- State of Massachusetts – Data resources include orthoimagery, scanned maps, tabular data, and vector (GIS) data. Categories include Transportation, Infrastructure, Recreation, Land Use, and Boundaries.
- Midwest (Illinois, Wisconsin, Indiana, others)
- Natural Connections-Green Infrastructure – Data about natural resources including parks, water, geographic boundaries, dunes, minerals, conservation areas, etc. Provided by Center for Neighborhood Technology.
- Texas
- Austin, Texas, school districts
- Texas General Land Office – Provides shapefiles and coverages (older ArcGIS format) for political, infrastructure, and natural features.
- Washington (state)
- Puget Sound Regional Council – Shapefiles for Urban Growth Boundaries, Traffic Analysis Zones, and other data (including transportation, housing, population), from the local MPO for the Seattle region. Other MPOs should model their websites’ data sections after the PSRC.
- City of Tacoma – A handful of datasets.
- Virtual Terrain Project
- University of Washington – Data links prepared by the Geomorphological Research Group at UW.
- Washington State Geospatial Data Archive (WAGDA) – Maintained by the University of Washington library.
- Country
- Canada
- Nationwide
- University of Waterloo directory – Links to Canada and international datasets.
- Alberta
- City of Edmonton Open Data Catalogue – Provides municipal and transit data in a variety of formats. For example, they offer a KML feed of bus stops serviced by Edmonton Transit System.
- British Columbia
-
- British Columbia Gateway – “Welcome to GeoBC, your gateway to provincial geographic information and services.” (Does not display well in Safari.)
- Nationwide
- Haiti
- Haiti Earthquake Data from the Harvard Center for Earthquake Geospatial Research
Web/API sources
- Web Map Service (WMS)
- United States Geological Survey – Includes high resolution orthoimagery, agriculture imagery, elevation, land cover, impervious surfaces, and tree canopy.
- OpenStreetMap (OSM) directory of servers
- United States Navy – 966 links for worldwide and American datasets. Maintained by the Digital Mapping, Charting and Geodesy Analysis Program (DMAP) in the Naval Research Laboratory.
- Application Programming Interfaces (APIs)
- Housing and Transportation Affordability – People move to the suburbs for cheap housing, but they end up paying more for transportation making the housing savings a wash. Created by Center for Neighborhood Technology (CNT).
- Transit-Oriented Development (TOD) Database – Find all transit stations near a given latitude/longitude coordinate. Created by Center for Neighborhood Technology (CNT).
- Census information, 2010 – Basic household information for the census blocks around a given latitude/longitude coordinate. Ideal for use with the TOD Database. Uses Summary File 1 info. Created by Center for Neighborhood Technology (CNT).
- Census information, 2000 – Same as above, but with year 2000 data.
- Census Reporter – Designed for journalists to quickly gather information about any place in the United States, Census Reporter also has an API.
Geocoding services
- University of Southern California – Provides its free, geocoding via standard web form or API to build into custom applications. Data returned includes Census Tract and Block, as well as FIPS codes for states, counties, and places (like statistical areas).
- Traffic Analysis Zone geocoding – A proof of concept web application, currently not public, for Cook County, Illinois, only.
- Do your own geocoding in QGIS