This polygon shapefile represents the projected extent of coastal erosion expected with 4.6 feet of sea level rise. The points depicted represent the highest estimated 100 yr tide elevation for locations surrounding the San Francisco Bay. Source: Pacific Institute. Source Date: 2008. 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 Pacific Institute. (2019). Future Erosion, San Mateo County Sea Level Rise Vulnerability Assessment Project, 2008. County of San Mateo Information Services Department. Available at: http://purl.stanford.edu/qq750jp2957. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.