Quick Reference to Additional GIS Resources
This page contains links to other Internet sites that are geographically-related yet not owned or controlled by Sonoma County or PRMD GIS.
The underlying aerial photographs used in the Flood Insurance Rate Maps (FIRMs or FIRMettes) are of unknown age and should not be relied upon as an accurate depiction of development on any given parcel. The depicted floodplains are based on the most recent Flood Insurance Study (FIS) and are considered current. For further information regarding this matter, please contact Alex Rosas, PRMD Engineering Division.
General Information about GIS
Wikipedia - A great place to find additional information about GIS.
CA State Water Resources Control Board - Onsite Wastewater Treatment System Map Tool
Google Maps - Sonoma County (View Larger Map)
Aerial Photography and Satellite Imagery
United States Census Demographic Information for Sonoma County (includes 2010 Census Tract Reference Maps)
GIS Related Websites
These documents are saved in Adobe Acrobat format.
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