Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM) 202601 Raster Charleston, SC NOAA's Ocean Service, Office for Coastal Management (OCM) https://coast.noaa.gov/slr https://coast.noaa.gov/digitalcoast/tools/slr https://coast.noaa.gov/slrdata https://coast.noaa.gov These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: https://coast.noaa.gov/slr. This metadata record describes the CA San Francisco Bay digital elevation model (DEM), which is a part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Office for Coastal Management's Sea Level Rise and Coastal Flooding Impacts Viewer described above. This DEM includes the best available lidar known to exist at the time of DEM creation that met project specifications. This DEM includes data for Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma Counties. The DEM was produced from the following lidar data sets: 1. 2023 USGS California Solano County Lidar 2. 2023 USGS California San Francisco Lidar 3. 2023 USGS California North Coast Ranges Lidar 4. 2023 USGS California Gaps Lidar 5. 2022 USGS Northern California Lidar 6. 2021 Alameda County CA QL0 and QL1 Lidar 7. 2020 Santa Cruz County CA Lidar 8. 2020 Santa Clara County CA Lidar 9. 2018 Northern California Wildfire Lidar 10. 2017 Western Mendocino County CNRA CA Lidar 11. 2013 Sonoma County Lidar 2013 12. 2010 - 2011 USGS San Francisco Bay Lidar The DEM is referenced vertically to the North American Vertical Datum of 1988 (NAVD88, Geoid12B) with vertical units of meters and horizontally to the North American Datum of 1983, realization 2011 (NAD83(2011)). The resolution of the DEM is approximately 3 meters. The NOAA Office for Coastal Management has developed high-resolution digital elevation models (DEMs) for use in the Office's Sea Level Rise internet mapping application. These DEMs serve as source datasets used to derive data to visualize the impacts of inundation resulting from sea level rise along the coastal United States and its territories. Source data and their associated metadata are available at the following URLs: 1. 2023 USGS California Solano County Lidar Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SolanoCounty_A23/CA_SolanoCounty_1_A23/ Metadata: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_SolanoCounty_A23/ 2. 2023 USGS California San Francisco Lidar Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/1m/Projects/CA_SanFrancisco_B23/ Metadata: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_SanFrancisco_B23/ 3. 2023 USGS California North Coast Ranges Lidar Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_NorthCoastRanges_B23/ Metadata: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_NorthCoastRanges_B23/ 4. 2023 USGS California Gaps Lidar Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_CaliforniaGaps_B23/CA_CaliforniaGaps_3_B23/ Metadata: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_CaliforniaGaps_B23/CA_CaliforniaGaps_3_B23/ 5. 2022 USGS Northern California Lidar Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_NorthernCA_B22/ Metadata: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_NorthernCA_B22/ 6. 2021 Alameda County CA QL0 and QL1 Lidar Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/1m/Projects/CA_AlamedaCounty_2021_B21/TIFF/ Metadata: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_AlamedaCounty_2021_B21/ 7. 2020 Santa Cruz County CA Lidar Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SantaCruzCounty_2020_A20/ Metadata: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_SantaCruzCounty_2020_A20/ 8. 2020 Santa Clara County CA Lidar Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SantaClaraCounty_2020_A20/ Metadata: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_SantaClaraCounty_2020_A20/ 9. 2018 Northern California Wildfire Lidar Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/1m/Projects/ Metadata: https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/metadata/CA_NoCAL_3DEP_Supp_Funding_2018_D18/CA_NoCAL_Wildfires_B4_2018/ 10. 2017 Western Mendocino County CNRA CA Lidar Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/1m/Projects/CA_FEMA_R9_Mendocino_HF_2017/ Metadata: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_FEMA_R9_Lidar_2016_D17/CA_FEMA_R9_Mendocino_HF_2017/ 11. 2013 Sonoma County Lidar 2013 Data Download: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/1m/Projects/ Metadata: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4703/index.html 12. 2010 - 2011 USGS San Francisco Bay Lidar Data Download: https://apps.nationalmap.gov/downloader/ Metadata: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1406/index.html 2010 2023 ground condition Complete None planned -123.633648 -121.207065 38.865167 36.893248 ISO 19115 Topic Category elevation None Bathymetry/Topography elevation Digital Elevation Model DEM lidar inundation flooding lidar topography sea level rise None US California Alameda County Contra Costa County Marin County Napa County San Francisco County San Mateo County Santa Clara County Solano County Sonoma County None The dataset is provided as is, without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes. Acknowledgment of the NOAA Office for Coastal Management as a data source would be appreciated in products developed from these data, and such acknowledgment, as is standard for citation and legal practices for data source, is expected. Data covers the tile scheme provided for the project area. Elevation data checked for anomalous elevation values outside expected range. A visual qualitative check was performed to ensure data completeness. All available lidar data known at the time of DEM creation that meets project specifications has been used to develop the DEM. Known data gaps may exist where lidar coverage was incomplete. The DEM is derived from the source lidar data. Horizontal accuracy testing is not performed on the DEM. Lidar source data assumed to meet 1 meter horizontal accuracy. The DEM is derived from the source lidar data. Vertical accuracy is not tested on the DEM. Project specifications require all source lidar data used in constructing the DEM to meet FEMA Specifications for Flood Hazard Mapping. The source elevation datasets listed above were identified, downloaded, edited, and finalized. 2025 Source elevation data and their associated hydro-breaklines, where available, were downloaded. Data were then reviewed and edited to meet the project's requirements. The major requirements were delineating streams 10m or greater in width, removing bridges over streams greater than 10m wide, flattening inland water bodies, and converting data referenced to an older geoid to the current geoid, Geoid12B. NOAA's VDatum datum conversion tool was used to convert geoids. Ocean-connected water areas were removed from data prior to final mosaicking. Data were then mosaicked together based on date, with the most recent data taking priority. Ocean-connected water areas were given a value of -99 to standardize this area's value across sources, to flatten water for mapping, and to make it easy for users to remove ocean-connected water if desired. 2025 Raster Grid Cell 73171 90042 1 0.000027 0.000027 Decimal degrees North American Datum of 1983 (2011) Geodetic Reference System 80 6378137.000000 298.257222101 North American Vertical Datum of 1988 0.001 meters Explicit elevation coordinate included with horizontal coordinates NOAA Office for Coastal Management mailing and physical

2234 South Hobson Ave.

Charleston SC 29405-2413 843-740-1202 coastal.info@noaa.gov Downloadable Data Any conclusions drawn from the analysis of this information are not the responsibility of the NOAA Office for Coastal Management or its partners. 20260129 NOAA Office for Coastal Management mailing and physical

2234 South Hobson Avenue

Charleston SC 29405-2413 843-740-1202 coastal.info@noaa.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998