NYU Spatial Data Repository

Urban Areas in Watersheds: San Francisco Bay Area, California, 2009

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This polygon shapefile depicts a watershed integrity cluster analysis at the CalWater 2.2.1 Planning Watershed (PWS) level performed by mapping factors representing some of the most significant watershed threats. Each of the individual watershed integrity factors was individually mapped and then combined in the watershed cluster analysis. This individual threat, cultivated, was created by taking CalWater watersheds at the planning unit level (most refined) and running zonal stats, part of spatial analyst. Urban comes from the California Department of Conservation Farming Mapping and Monitoring Program (FMMP) and was first converted to a grid so zonal stats could be used. The FMMP defines Urban land as occupied by structures with a building density of at least 1 unit to 1.5 acres, or approximately 6 structures to a 10-acre parcel. This land is used for residential, industrial, commercial, construction, institutional, public administration, railroad and other transportation yards, cemeteries, airports, golf courses, sanitary landfills, sewage treatment, water control structures, and other developed purposes. The CalWater PWS watershed was the zone dataset (pwsname as the zone field) and Urban as the value raster. The result gives you the mean percent Urban in the nine county San Francisco Bay Area Region, California at the watershed level in a table that you can join back to the CalWater GIS layer and then symbolize as a graduated color with the mean being the value field. This analysis was done as a part of the Conservation Lands Network Fish and Riparian Focus Team.This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California.
Bay Area Open Space Council
San Francisco Bay (Calif.), San Francisco Bay Area (Calif.), Alameda County (Calif.), Contra Costa County (Calif.), Marin County (Calif.), Napa County (Calif.), San Francisco County (Calif.), San Mateo County (Calif.), Santa Clara County (Calif.), Solano County (Calif.), and Sonoma County (Calif.)
Urban watersheds, Wildland-urban interface, Cities and towns, Metropolitan areas, Inland Waters, Structure, and Transportation
Held by:
Preservation record:
Variable Value
Click object on map to see data values