City of Madison Open Map Data

The City of Madison Data initiative increases the availability of city data using open standards which will make the operation of city government more transparent, effective and accountable to the public. To encourage open access to government data, the City of Madison publishes a wide range of approved city datasets and makes them available at the City of Madison Data portal.

City of Madison is dedicated to increasing the amount and range of data sets available in the data catalog. This project is in its infancy, but will continue to grow. You can be part of this growth by suggesting datasets and by sharing innovative ways of using City of Madison data sets.

Data Policy

Using This Site

Use the search bar at the top of the page to find data relating to topics of interest. As you browse through the different data, the extent of each will be displayed on the map. Once you find what you are looking for, select the data to be able to view the data and get options for download. Alternatively, click here for a current list of data.

Downloading Data

Data is offered for download in several ways. First the data can be downloaded as shapefiles or KML for GIS applications, and CSV for tables and spreadsheets. Additionally, by using the API link, data from this site can be embedded in other applications with the feature service link or GeoJson.