The County of Sonoma supports the Open Government Initiative and is undertaking its own strategic initiative to make GIS data accessible to citizens. ISD GIS is utilizing standards developed by the Open Geospatial Consortium (OGC) to support interoperable solutions that “geo-enable” the web.

ISD GIS is implementing a pilot program for Open Data using Socrata and Esri Open Data. The program is in the early stages of development so check back frequently for updates.

To download GIS data go to our ArcGIS Open Data Portal

Additional Layers:

  • Parcels (approx 59 mb)
    • Parcel boundaries and APNs for the County of Sonoma.
  • County Streets (approx 10 mb)
    • Street centerlines for the County of Sonoma.

If you have data needs not addressed in the above download page or are having difficulties downloading the data please contact us.

The County of Sonoma Permits and Resource Management Department (PRMD) maintains additional GIS datasets which are available to download from their site. You can also view the data interactively with the ActiveMap web mapping application.

PRMD GIS Data Download

– See more at: http://sonomacounty.ca.gov/ISD/Systems-and-Programming/GIS/Data-Downloads/#sthash.xrAexISA.dpuf


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