The County's Open Data team is excited to share with you the launch of the Esri open data site. In addition to over 300 map layers for you to explore, you can find links to County of San Mateo projects that use spatial data and publish maps as part of their work.

This is the community's public platform for exploring and downloading open data, discovering and building apps, and engaging to solve important local issues. You can analyze and combine Open Datasets using maps, as well as develop new web and mobile applications. Let's make our great community even better, together!

If you’re interested in developing apps based on our geographic data, you can access all the data via an application programming interface (API). Take a look around and let us know what you think: http://data-smcmaps.opendata.arcgis.com/