Citizen-mapped agency data

A quick guide to citizen-mapped agency data sites

LOCAL FLAVOR: The Bart Station Maps site gives users a bird's-eye view of the San Francisco Bay area.

The Web is awash in citizen-run sites that map government-generated data. These sites use free services such as Google Maps and Microsoft Virtual Earth and public records from agencies such as the Environmental Protection Agency and the Geological Survey. With these sites, Web surfers can enter their addresses and see government data in their area, or to browse a certain region to find items of interest.

Here are a few examples of your hard work reused on the Web:
BART Station Maps (San Francisco Bay Area Rapid Transit):

CityRanks US Populations (Census):

Congressional Travel Maps (Congressional junkets; Congress record offices):

Earthquakes in the last week (U.S. Geological Survey):

EPA Superfund Site Locator (Environmental Protection Agency):

U.S. Mining Database (Bureau of Land Management):

Hurricane Storm Reports (National Oceanic and Atmospheric Administration):

Libraries411 (local government data):

Seattle911 (Seattle Fire Department):

WeatherMole (NOAA): WeatherMole/index.html

Zip Code Boundaries (Postal Service):

Zoomatron Nautical Maps (NOAA):

Source: John Musser's Programmable Web (

About the Author

Joab Jackson is the senior technology editor for Government Computer News.


  • business meeting (Monkey Business Images/

    Civic tech volunteers help states with legacy systems

    As COVID-19 exposed vulnerabilities in state and local government IT systems, the newly formed U.S. Digital Response stepped in to help. Its successes offer insight into existing barriers and the future of the civic tech movement.

  • data analytics (

    More visible data helps drive DOD decision-making

    CDOs in the Defense Department are opening up their data to take advantage of artificial intelligence and machine learning tools that help surface insights and improve decision-making.

Stay Connected