San Francisco Bay and Sacramento-San Joaquin Delta DEM for Modeling Version 4 (superseded)
#Superseded https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4-1## A more recent version of this product appears here: This product will continue to be distributed for archival purposes. ##Domain and Product Changes in the current bathymetry release (version 4) are limited to the region east of the Carquinez Strait (starting around Carquinez Bridge). To facilitate compatibility released by us and our partners, DWR distribute the region west as a separate companion tile and delineate the boundary of active revision in the present product in a place where its source data matches that of other Bay elevation models, e.g., the 2m seamless high-resolution bathymetric and topographic DEM of San Francisco Bay by USGS Earth Resources Observation and Science Center (EROS) (https://topotools.cr.usgs.gov/coned/sanfrancisco.php ), the 2010 San Francisco Bay DEM by National Oceanic and Atmospheric Administration (https://www.ngdc.noaa.gov/metaview/page?xml=NOAA/NESDIS/NGDC/MGG/DEM/iso/xml/741.xml&view=getDataView&header=none ) or the prior (version 3) 10m digital elevation model (https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-v3 ).The 10m DEM for the Bay-Delta is based on the first on the list, i.e. EROS’ 2m DEM for the Bay New work reported here was done at 2m resolution, although the improvements have been incorporated into the 10m products as much as possible. Relative to the previous DWR release (https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-v3), the 2m DEM product reported here consolidates work at this resolution into a small number of larger surfaces representing approximately one-third of the Delta (link to the Coverage Areas page). Laterally, the 2m models now extend over the levee crest as needed to match well with Delta LiDAR (http://www.atlas.ca.gov/download.html#/casil/imageryBaseMapsLandCover/lidar2009 ), the main terrestrial source of data used in this work. The 10m product (link to the Coverage Areas page) is based on the updated USGS DEM (https://www.sciencebase.gov/catalog/item/58599681e4b01224f329b484 ). In places where updated 2m models overlap the 10 meters, the 10m base elevation model was updated by resampling the new 2m model and adding levee enforcement. At the border between the 2m and 10m models, the two resolutions were locally edge-matched over a small region to maintain smoothness. For more information, please refer to the article: A Revised Continuous Surface Elevation Model for Modeling (link to Chapter 5 in the 2018 Annual Report). Please note that by agreement with our data providers we distribute only our own integrated maps, not the original source point data. Version:4 Time Completed: June 2018 Horizontal Datum: NAD83 Spheroid:GRS1980 Projection:UTM_Zone_10N (meters) Vertical Datum:NAVD88 (meters) ##Data Sources [https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/981a57b5-e16f-4632-b7e0-4a533534a79c](https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/981a57b5-e16f-4632-b7e0-4a533534a79c) ##Coverage Areas [https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/2e3f2b6e-9f0d-4719-b32a-dff449be18af](https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/2e3f2b6e-9f0d-4719-b32a-dff449be18af)
Data files
| Data title and description | Access data | File details | Last updated |
|---|---|---|---|
Data Source Polygon Shapefile | Download | ZIP | 08/11/23 |
San Francisco Bay and Sacramento-San Joaquin Delta (10 meters, Jun 2018, 537 MB) | Download | ZIP | 08/11/23 |
South Delta (2 meters, Jun 2018, 60.7 MB) | Download | ZIP | 08/11/23 |
Columbia Cut (2 meters, Sep 2012, 2.2 MB) | Download | ZIP | 08/11/23 |
Sacramento-San Joaquin Delta (10 meters, Jun 2018, 55.7 MB) | Download | ZIP | 08/11/23 |
False River, Fishermans Cut, Piper Slough (2 meters, Nov 2017, 2.8 MB) | Download | ZIP | 08/11/23 |
Montezuma Slough (2 meters, Jun 2018, 33.5 MB) | Download | ZIP | 08/11/23 |
North Delta (2 meters, Dec 2017, 114.9 MB) | Download | ZIP | 08/11/23 |
San Joaquin River (2 meters, Dec 2015, 1.2 MB) | Download | ZIP | 08/11/23 |
Turner Cut (2 meters, Sep 2012, 0.7 MB) | Download | ZIP | 08/11/23 |
Yolo Bypass (2 meters, Dec 2016, 401.7 MB) | Download | ZIP | 08/11/23 |
Horseshoe Bend (2 meters, Sep 2015, 1.4 MB) | Download | ZIP | 08/11/23 |
Supporting files
| Data title and description | Access data | File details | Last updated |
|---|---|---|---|
Data Sources Map ##Data Sources Map * [Spatial Image of Multibeam Data Sources](https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/8abf05c5-3362-459a-8536-329de5ab6afa) * [Spatial Image of Single-Beam Data Sources](https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/b19a32b6-7749-4f39-aa31-28d17bead424) * [Spatial Image of Raster Data Sources](https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/5d0e9857-fce1-4e74-821c-fb1db678a946) * [Data Sources Polygon Shapefile](https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/68bdc08c-e392-4a78-936b-c818c7865bbb) ##Data Sources References listed in A Revised Continuous Surface Elevation Model for Modeling (link to Chapter 5 of the 2018 Annual Report) ###Multibeam: * California Department of Water Resources North Central Region Office 2010–2018: [(California Department of Water Resources North Central Region Office 2010–2018)](https://gis.water.ca.gov/app/bathymetry/) * U.S. Geological Survey 2011 (Finlayson, et al. 2011) https://www.sciencebase.gov/catalog/item/588f8d74e4b072a7ac08c35e * Central Valley Floodplain Evaluation and Delineation Program, California Department of Water Resources, 2010 (California Department of Water Resources 2010) * Fugro West, 2010 (Fugro West, Inc. 2010) * Global Remote Sensing 2008 (Global Remote Sensing LLC 2008) ##Single-Beam: * Five Points Area (2009), South Delta Scour Survey (2010), Old River at Salmon Slough (2013): (California Department of Water Resources, North Central Region Office 2010–2018) * Central Valley Floodplain Evaluation and Delineation Program TO18 (2011): (California Department of Water Resources 2010) * Environmental Data Solutions, West Delta Bathymetry Survey (2009): (Environmental Data Solutions 2009) * Knights Landing Ridge Cut bathymetry survey (2013): (Campbell, Taber, and Bowles, 2013) * Northern Region Office, Fremont Weir (2013): (California Department of Water Resources, Northern Region Office 2013) * Tule Canal (2010): (Campbell, 2012) * Lisbon Weir (2002): (California Department of Water Resources 2002) * U.S. Army Corps of Engineers (1988), National Oceanic and Atmospheric Administration-National Ocean Service (1990), California Department of Water Resources, Old River (1999), California Department of Water Resources (2000), California Department of Water Resources (2001): (California Department of Water Resources 2003) http://baydeltaoffice.water.ca.gov/modeling/deltamodeling/models/csdp/csdp.cfm * Wetlands & Water Resources, Nurse Slough (2012): (Wetlands and Water Resources, Inc. 2013) ##Raster: * [2m Little Holland Tract Digital Elevation Model: (Snyder, Stevens, Carlson, and Lacy, 2015)](https://www.sciencebase.gov/catalog/item/564bafdce4b0ebfbef0d3322) * 1m Central Valley Floodplain Evaluation and Delineation Light Detection and Ranging: (California Department of Water Resources 2010) * [10m San Francisco Bay-Delta Digital Elevation Model: (Fregoso, Wang, Ateljevich, and Jaffe 2017)](https://www.sciencebase.gov/catalog/item/58599681e4b01224f329b484) * [1m Delta Light Detection and Ranging: (California Department of Water Resources 2007)](http://www.atlas.ca.gov/download.html#/casil/imageryBaseMapsLandCover/lidar2009) * [2m San Francisco Bay Digital Elevation Model: (Earth Resource and Observation Science Center, U.S. Geological Survey 2013)](http://edcintl.cr.usgs.gov/downloads/sciweb1/shared/topo/downloads/Topobathy/TOPOBATHY_SAN_FRANCISCO_ELEV_METERS.zip) * 2m Suisun Digital Elevation Model: (Handley, 2007) | BIN | 11/26/24 | |
Coverage Areas * [Spatial Image of the Completed 2-meter DEMs for Version 4 (V4) Release](https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/19d8396a-a8c3-4cae-90b1-1e35a5db1596) * [Spatial Image of the Updated 10-meter DEM for the Sacramento-San Joaquin Delta (Delta), Consistent with V4 2-meter DEMs](https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/45c5187d-d003-411d-bde8-ad673eba3c56) * [Spatial Image of the 10-meter San Francisco Bay and Sacramento-San Joaquin Delta DEM, Compatible with V4 10-meter Delta DEM](https://data.cnra.ca.gov/dataset/san-francisco-bay-and-sacramento-san-joaquin-delta-dem-for-modeling-version-4/resource/b8ab314d-7a9b-41fa-8b56-49e3dda5eb36) | BIN | 11/26/24 | |
Spatial Image of the Completed 2-meter DEMs | PNG | 08/11/23 | |
Spatial Image of Raster Data Sources | PNG | 08/11/23 | |
Spatial Image of the 10-meter Sacramento-San Joaquin Delta DEM | PNG | 08/11/23 | |
Spatial Image of Multibeam Data Sources | PNG | 08/11/23 | |
Spatial Image of the 10-meter San Francisco Bay and Sacramento-San Joaquin Delta DEM | PNG | 08/11/23 | |
Spatial Image of Single-Beam Data Sources | PNG | 08/11/23 |
