California has adopted a massive, interactive online database of location-based government data that includes over 1200 publicly available data sets from 25 state entities.

The California State Geoportal collects geospatial data from government agencies including housing, water, transportation and health information. The data is compatible with geolocation software and is designed to be shared, layered onto maps and analyzed.

The portal was designed by ESRI.  Check it out!