This polygon shapefile depicts the nine counties of California. This data was derived from the United States Census Bureau Topologically Integrated Geographic Encoding and Referencing GIS database called TIGER/Line. This coverage is a common base layer used for reference, to identify what county data is within, as well as for cartographic purposes. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project and contributed to the developement of the Conservation Lands Network. Bay Area Open Space Council, GreenInfo Network, Conservation Lands Network, and San Francisco Bay Area Upland Habitat Goals Project. (2011). Counties: California, 2010. Bay Area Open Space Council. Available at http://purl.stanford.edu/jm667wq2232. None, GNU General Public License (GPL), put in the url. in cased used incorrectly, make $ off it, limit liability. for use constraints This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.