This polygon shapefile represents subregion boundaries of the Don Edwards San Francisco Bay Wildlife Refuge. Data were last acquired in 2016 from U.S. Fish & Wildlife Service. This layer is part of the San Mateo County Sea Level Rise Vulnerability Assessment Project. These data are intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production. County of San Mateo Information Services Department and U.S. Fish and Wildlife Service. (.2019). Subregions, Don Edwards San Francisco Bay Wildlife Refuge, 2016. County of San Mateo Information Services Department. Available at: http://purl.stanford.edu/wy500cg7502. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.