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Online Mapping Viewers

The Map Gallery Viewers provide easy access to location based information pertaining to a specific subject and/or area within the unincorporated area of Sonoma County. The viewers run anywhere and on any device (desktops, tablets, and smart phones).

 

Viewer Description
Opens viewer in new browser window. Sonoma County CTS Viewer

On September 20, 2011, the U.S. Fish and Wildlife Service designated approximately 47,383 acres as critical habitat for the Sonoma California Tiger Salamander (CTS) under the Endangered Species Act. The Sonoma County CTS viewer allows easy access to identify permits recently issued within the CTS boundary for properties residing within the unincorporated area of Sonoma County. For further details regarding the critical habitat designation, refer to the Fish and Wildlife Service News Release and/or Federal Register.

Ready-To-Print PDF Maps

The following is a list of free GIS hard copy maps that are available for download. The GIS maps provide location-based information pertaining to a specific subject matter and area as well as countywide indexes. The size of the maps are small (8-1/2" by 11"), medium (11" by 17") or large (34" by 44") and are in Portable Document Format (PDF). To view the maps in PDF format, the free Adobe Acrobat Reader is required. PDF File Get Adobe® Reader®


All gallery maps listed can be ordered directly from PRMD GIS. To place a map order or to explorer other available maps not listed below, please refer to GIS Online Services — Mapping Products.


Countywide Maps

Incorporated City Urban Boundary Maps

Sonoma County Adopted Plan Maps

Special Study Area Maps

Sonoma County Third Party Maps

 

Downloading Map Gallery Files

To download a map file to a local computer, right-click on the map link and select "Save Target As..." from the pop-up window. On the computer, select a folder to store the map and click "Save" to download the file. When the download is complete, open the file using Adobe Acrobat Reader.


Countywide Maps

Map Description Map/File Size
Air Quality Control Districts The map represents the air quality control districts within the County of Sonoma. 11" x 17"
(1.3 mb)
Building Inspection Areas The map represents building inspection areas within the County of Sonoma. PRMD Area IDs by Inspector Area Report 11" x 17"
(1 mb)
Code Enforcement Inspection Areas The map represents code enforcement inspection areas within the County of Sonoma. PRMD Area IDs by Inspector Area Report 11" x 17"
(1.1 mb)
Groundwater Availability Areas The map represents four groundwater availability classifications (zones) that identify water yield, natural recharge and/or major/marginal groundwater basins within the County of Sonoma. 11" x 17"
(675 kb)
NPDES/MS4 Boundary The map represents areas subject to the National Pollutant Discharge Elimination System (NPDES) within the County of Sonoma. The areas within NPDES are subject to storm water requirements to improve water quality. 34" x 44"
(7.8 mb)
Planning Areas & Supervisor Districts The map represents a combination of land development base information as well as the planning areas [the nine geographical sub regions of Sonoma County's General Plan] and the board of supervisor boundaries. The board of supervisor boundaries depict the five geographical sub regions of Sonoma County's legislative body which governs the largest political/jurisdictional boundary of local government within the State of California. 34" x 44"
(785 kb)
PRMD Area IDs The map represents 42 geographic areas within the County of Sonoma. The county is divided into these areas for the purposes of various types of inspections that PRMD staff performs. These areas are named for communities but are not necessarily contiguous with any individual community boundary due to aggregation of several communities into the larger area. These areas are called Area IDs and are appended to the address attached to permits and activities processed at PRMD. Three character IDs indicate unincorporated areas and two character IDs are incorporated cities. PRMD Area IDs by Inspector Area Report 11" x 17"
(1.38 mb)
Sonoma County & Incorporated Cities The map represents the Sonoma County boundary and the nine city limits within the county. 34" x 44"
(913 kb)
USGS 7.5 Minute Quadrangle The map represents the United States Geological Survey (USGS) 7.5 minute quadrangle index which divides the county into quadrangles bound by two lines of latitude and two lines of longitude, and is named after the most prominent feature (e.g. area name) in the quadrangle. The index assists in locating the corresponding USGS topological map by name - number (e.g. Annapolis - 10, Petaluma River - 38). 11" x 17"
(4,453 kb)
USGS Geologic Hazards - Spectral Response Acceleration CRC or CBC The Spectral Response Acceleration CRC or CBC map represents the USGS contour intervals of spectral response acceleration expressed as a percent of gravity [%g] and influences/impacts structures built to conventional, non-engineered construction standards within specified geographical areas within Sonoma County. This map can be used to determine if a site falls within the guidelines for using the CRC (California Residential Code) rather than the more restrictive CBC (California Building Code) for conventional construction. In order to use the CRC, a site must have an SDS that is less than or equal to 1.17g which corresponds to the 175 contour interval depicted on the map. There are exceptions and design considerations that may also need to be taken into account but this is the basic guideline. 11" x 17"
(785 kb)
USGS Geologic Hazards - Spectral Response Acceleration SDC D/E Anchor Bolts The Spectral Response Acceleration SDC D/E Anchor Bolts map represents the USGS contour intervals of spectral response acceleration expressed as a percent of gravity [%g] and influences/impacts structures built to conventional, non-engineered construction standards within specified geographical areas within Sonoma County. Where contour intervals of spectral response acceleration is less than or equal to 75 [known as SDC D], case structures residing within these geographical areas MAY use inch anchor bolts. Where contour intervals of spectral response acceleration are greater than 75 [known as SDC E], case structures residing within these geographic areas are REQUIRED to use 5/8 inch anchor bolts. 11" x 17"
(752 kb)
USGS Geologic Hazards - Spectral Response Acceleration Wall Bracing The Spectral Response Acceleration Wall Bracing map represents the USGS contour intervals of spectral response acceleration expressed as a percent of gravity [%g] and determines the required amount of wall bracing for structures built to conventional, non-engineered construction standards within specified geographical areas within Sonoma County. 11" x 17"
(744 kb)
Waiver Prohibition Areas The map series represents the waiver prohibition areas within the County of Sonoma. Waiver Prohibition Area Ordinances 8-1/2" x 11"
(2.9 mb)
Well & Septic Environmental Health Districts The map represents the well and septic environmental health districts within the County of Sonoma. PRMD Area IDs by Inspector Area Report 11" x 17"
(1.5 mb)
Wet Weather Zones
(Percolation Test /
Groundwater Determination Zones)
The map represents seven wet weather zones (percolation/groundwater determination zones) within the County of Sonoma. The Memorandum of Understanding with the State of California Regional Water Quality Control Board allows for wet weather percolation and groundwater testing during a specified period of time (e.g. January through March), and after having received 50% of the average rainfall. The map assists in locating subject properties interested in testing between the said specified annual period of time.

Detailed map per Wet Weather Zones:
8-1/2" x 11"
(549 kb)
Williamson Act Land Contracts The map represents all parcels within the County of Sonoma abiding by and under The California Land Conservation Act of 1965 as of January 1, 2017. 34" x 44"
(5 mb)

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Incorporated City Urban Boundary Maps

Map Description Map/File Size
Annexation Report The annexation report represents unincorporated lands annexed into city jurisdictions. 8.5" x 11"
(563 kb)
City of Cloverdale The map represents the City of Cloverdale's urban boundaries which includes the city limit, sphere of influence, urban growth and urban service area. 11" x 17"
(458 kb)
City of Cotati The map represents the City of Cotati's urban boundaries which includes the city limit, sphere of influence, urban growth and urban service area. 11" x 17"
(717 kb)
City of Healdsburg The map represents the City of Healdsburg's urban boundaries which includes the city limit, sphere of influence, urban growth and urban service area. 11" x 17"
(668 kb)
City of Petaluma The map represents the City of Petaluma's urban boundaries which includes the city limit, sphere of influence, urban growth and urban service area. 11" x 17"
(1 mb)
City of Rohnert Park The map represents the City of Rohnert Park's urban boundaries which includes the city limit, sphere of influence, urban growth and urban service area. 11" x 17"
(847 kb)
City of Santa Rosa The map represents the City of Santa Rosa's urban boundaries which includes the city limit, sphere of influence and urban growth. 11" x 17"
(2.2 mb)
City of Sebastopol The map represents the City of Sebastopol's urban boundaries which includes the city limit, sphere of influence, urban growth and urban service area. 11" x 17"
(494 kb)
City of Sonoma The map represents the City of Sonoma's urban boundaries which includes the city limit, sphere of influence, urban growth and urban service area. 11" x 17"
(594 kb)
Town of Windsor The map represents the Town of Windsor's urban boundaries which includes the city limit, sphere of influence, urban growth and urban service area. 11" x 17"
(1.7 mb)

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Sonoma County Adopted Plan Maps

Map Description Map/File Size
General Plan 2020
Land Use & Open Space Plan Maps
The map set represents Land Use and Open Space & Resource Conservation Elements as specified in the Sonoma County General Plan 2020 as adopted on September 23, 2008 by Resolution No. 08-0808. 11" x 17"
(various kb)
Hazard Mitigation Plan Maps The map set represents the Hazard Mitigation Plan as adopted on October 25, 2011 by Resolution No. 11-0582. The various maps identify areas in the county that may be affected by different types of natural hazards and different intensities as adopted in the General Plan 2020, and/or Tsunami Response Plan, and/or Hazard Mitigation Plan. Natural hazard events such as earthquakes, floods, landslides, tsunamis and wildfires have the potential to result in property loss and/or injury. Therefore, specific building and development restrictions and/or requirements may apply. 11" x 17"
(various kb)
Area & Specific Plans The map set represents area and specific plans, local communities, subject to the Sonoma County General Plan 2020 Land Use Element Policy LU-1a as adopted on September 23, 2008 by Resolution No. 08-0808. The local communities are subject to the specific and area plan development policies. Each community is unique and therefore, has particular policies and goals which assist in governing development potential. various sizes
(various kb)

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Special Study Area Maps

Map Description Map/File Size
Flood Prone Urban Area The map represents flood prone urban area boundary, a geographical area known as the Permit and Resource Management Department (PRMD) Flood Prone Ordinance 4467. Flood Prone Ordinance 4467 addresses concerns regarding the impact of grading on existing or future drainage patterns. [Click here to view black and white map version.] 8-1/2" x 11"
(301 kb)
Sonoma Valley Citizen Advisory Commission Area (SVCAC) The map represents the SVCAC boundary, planning subareas and representation areas. For more information, refer to the SVCAC website. 34" x 44"
(3 mb)

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Sonoma County Third Party Maps

Map Description Map/File Size
Santa Rosa Plain Conservation Strategy (SRPCS) Area - Enclosure 1 The map represents the location of occurrences of the California Tiger Salamander (CTS) and their breeding habitat as well as areas where development could adversely impact CTS and listed plants within the Santa Rosa Plain, County of Sonoma. 11" x 17"
(2.3 mb)
Santa Rosa Plain Conservation Strategy (SRPCS) Area - Figure 3 The map represents designations of potential habitat for the California Tiger Salamander (CTS) and listed plants as well as existing and pending mitigation banks within the Santa Rosa Plain, County of Sonoma. 11" x 17"
(4.2 mb)

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Terms and Conditions of Use

Liability Disclaimer
The County of Sonoma Permit and Resource Management Department (PRMD) provides maps as a public resource of general information for use "as is." PRMD GIS (Geographic Information System) section provides information with the understanding that it is not guaranteed to be accurate, correct or complete and any conclusions drawn from such information are the sole responsibility of the user. Since the map resources are approximations and not parcel specific, users should not act based on information obtained from these maps without verifying the information with qualified PRMD staff and, as necessary, obtaining professional advice regarding site/parcel specific development matters.

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Although every effort is made to provide complete and accurate information on this website, users are advised to contact appropriate PRMD staff before making project decisions. This may involve contacting more than one section within PRMD (e.g. Building, Plan Check, Zoning, Well & Septic, etc.), since each section implements specific codes or ordinances which may affect your project.
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