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.
PRMD GIS makes no representations concerning the content of these sites. The inclusion of a link does not constitute an endorsement, warranty or guarantee of
the information, products or services, if any, described or offered at these other Internet sites. Links to resources outside PRMD are provided as a convenience to users and, as such, PRMD specifically disclaims any and all liability for any claims or damages that may result from the linked web sites and does not accept any responsibility for the accuracy, completeness, reliability, suitability, or timeliness of the content found on external sites. These linked sites are maintained according to their own terms and conditions of use and should be accessed at the user's own risk.
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.
American Philosophical Society Map Collection
ArcGIS Explorer (GIS Viewer)
CA State Water Resources Control Board - GeoTracker
CA State Water Resources Control Board - Onsite Wastewater Treatment System Map Tool
(Is my property near a nutrient or pathogen impaired water body?)
Color Landform Atlas of the United States
David Rumsey Historical Map Collection
FEMA FIRMettes (see under Flood Map Tools) – (How to Find Your FIRM & Make a FIRMette)
FEMA Online Letter of Map Correction (LOMC) Web Application
(Is my property near natural hazards such as earthquakes, floods, fires, tsunami?)
NASA's Visible Earth
National Geographic Society's Map Machine
Sonoma County Street Maps - Yellow Maps
USDA, National Resources Conservation Service (NRCS) - Web Soil Survey
Aerial Photography and Satellite Imagery
Historical Aerial Photo Resources
United States Census Bureau
United States Census Bureau's - Gazetteer
United States Census Bureau's - American Fact Finder
United States Census Demographic Information for Sonoma County (includes 2010 Census Tract Reference Maps)
GIS Related Websites
California Natural Diversity Database (CNDDB)
Cal-Atlas Geospatial Clearinghouse (formerly the California Spatial Information Library (CaSIL)
Federal Emergency Management Agency (FEMA)
FEMA Coastal Flood Risk (Open Pacific Coast Study - Participation Welcomed! )
FEMA Map Information eXchange (FMIX)
FEMA Online Letter of Map Change (LOMC) Application (Electronic Letter of Map Amendment (eLOMA) Fact Sheet )
Local Agency Formation Commission (LAFCO)
State of California Department of Conservation (DOC)
The Conservation Lands Network, Bay Area Open Space Council
United States Geological Survey (USGS)
USDA, National Resources Conservation Service (NRCS)
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