Welcome to the GIS data download site. MarinMap and County of Marin have posted a variety of useful GIS data files in ESRI shape format. There are also color aerial orthophotographs from March 31/April 1, 2004 available (“ortho” means that the photographs have “real world” coordinates). All GIS data are in California State Plane coordinates, NAD83, HARN in US Survey feet. These files have been compressed into “zip” files to reduce their size for downloading. You will need a free utility such as “WinZip” to “unzip” the files for use.
In order to download MarinMap data or use the map application viewer you should perform the following steps:
Disclaimer MarinMap/Marin County has attempted to verify the accuracy of the information contained in the following maps at the time of publication. Marin County assumes no liability for any errors, omissions, or inaccuracies in the information provided regardless of how caused. MarinMap/Marin County also assumes no liability for any decisions made or actions taken or not taken by the user of MarinMap/Marin County's Internet site in reliance upon any information or data furnished hereunder.
THE MAPS PROVIDED BY MARIN COUNTY ARE PROVIDED ON AN “AS IS” AND AS AVAILABLE BASIS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT OR OTHER WARRANTIES, CONDITIONS, GUARANTEES OR REPRESENTATIONS, WHETHER EXPRESS OR IMPLIED.
THE MARIN COUNTY MAP SERVICES ARE COMPLEX AND MAY CONTAIN NONCONFORMITIES,
DEFECTS OR ERRORS. MARIN COUNTY HEREBY DISCLAIMS ANY REPRESENTATION OR WARRANTY
THAT THE MARIN COUNTY MAP SERVICES WILL MEET YOUR NEEDS, EXPECTATIONS OR
INTENDED USE, THAT THE MARIN COUNTYMAP SERVICES WILL BE ERROR FREE OR
UNINTERRUPTED, OR THAT NONCONFORMITIES CAN OR WILL BE CORRECTED.
Most map data, especially parcels, are not survey precise.