Digital elevation model (DEM) of the Cache Slough Complex, Sacramento-San Joaquin Delta, California

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Frequently anticipated questions:

What does this data set describe?

Title:
Digital elevation model (DEM) of the Cache Slough Complex, Sacramento-San Joaquin Delta, California
Abstract:
This metadata describes a digital elevation model (DEM) created from bathymetric and topographic data collected between 2004 and 2019 in the Cache Slough Complex (CSC), northern Sacramento-San Joaquin Delta, California. We merged the newly collected bathymetric and topographic data presented in this data release (DOI:10.5066/P9AQSRVH) with 2019 surveys by the California Department of Water Resources (DWR), 2017 USGS Sacramento Delta Lidar, and 2004 bathymetry data from the Army Corp of Engineers. Small gaps of missing data were filled with existing DWR/USGS Delta DEMs to produce a seamless DEM of the Cache Slough Complex with a grid resolution of 1 m. Remaining gaps in the DEM are areas where there is currently no available data.
Supplemental_Information:
Additional information about the field activities from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-684-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-649-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2015-642-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology.
  1. How might this data set be cited?
    Fregoso, Theresa A, Wang, Rueen-Fang, Stevens, Andrew W., Handley, Thomas, Lacy, Jessica R., and Ateljevich, Eli, 20200224, Digital elevation model (DEM) of the Cache Slough Complex, Sacramento-San Joaquin Delta, California: data release DOI:10.5066/P9AQSRVH, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Fregoso, Theresa A., Stevens, Andrew W., Wang, Rueen-Fang, Handley, Thomas, Dartnell, Peter, Lacy, Jessica R., Ateljevich, Eli, and Dailey, Evan T., 2020, Bathymetry, topography, and acoustic backscatter data, and a digital elevation model (DEM) of the Cache Slough Complex and Sacramento River Deep Water Ship Channel, Sacramento-San Joaquin Delta, California: data release DOI:10.5066/P9AQSRVH, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -121.806348
    East_Bounding_Coordinate: -121.578296
    North_Bounding_Coordinate: 38.376606
    South_Bounding_Coordinate: 38.209375
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/5d781129e4b0c4f70d020cdd?name=DEM_CacheSloughComplex_2020_NAVD88_u83_meters.png&allowOpen=true (PNG)
    Quick view image of the Cache Slough Complex DEM.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 2004
    Ending_Date: 2019
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Raster Digital Data Set
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Raster data set. It contains the following raster data types:
      • Dimensions 18282 x 19689 x 1, type Grid Cell
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 10
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -123.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000.0
      False_Northing: 0.0
      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 1.0
      Ordinates (y-coordinates) are specified to the nearest 1.0
      Planar coordinates are specified in Meter
      The horizontal datum used is D_North_American_1983.
      The ellipsoid used is GRS_1980.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257222101.
  7. How does the data set describe geographic features?
    floating point
    GeoTiff with elevation data associated with the digital elevation model (DEM) relative to NAVD88. Cells with values of -3.4028231e+38 indicate no data. (Source: Producer defined)
    Value
    Elevation relative to NAVD88 (Source: Producer defined)
    Range of values
    Minimum:-22.408315658569
    Maximum:12.170000076294
    Units:meters
    Resolution:0.01
    Entity_and_Attribute_Overview:
    DEM in meters using NADV88 datum showing bathymetric and topographic elevations of the Cache Slough Complex, Sacramento-San Joaquin Delta, California
    Entity_and_Attribute_Detail_Citation:
    The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Theresa A Fregoso
    • Rueen-Fang Wang
    • Andrew W. Stevens
    • Thomas Handley
    • Jessica R. Lacy
    • Eli Ateljevich
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: PCMSC Science Data Coordinator
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

These data were collected in support of ongoing field experiments and numerical modeling with the U.S. Bureau of Reclamation to improve our understanding of habitat quality, the influence on various landscape features on ecosystem function, and the effects of restoration actions in the Sacramento-San Joaquin Delta. These data are intended for science researchers, students, policy makers, and the general public.

How was the data set created?

  1. From what previous works were the data drawn?
    Cache Single Beam (source 1 of 15)
    Stevens, A.W., Dartnell, P., Fregoso, T.A., Lacy, J.R., and Dailey, E.T., 2020, Single-beam bathymetry data collected in the Cache Slough Complex, Sacramento-San Joaquin Delta, California, during USGS field activities 2017-69-FA and 2018-684-FA: U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Type_of_Source_Media: Digital
    Source_Contribution: Bathymetric data that was used in final DEM
    Cache Swath (source 2 of 15)
    Stevens, A.W., Dartnell, P., Fregoso, T.A., Lacy, J.R., and Dailey, E.T., 2020, Swath bathymetry data collected in the Cache Slough Complex and the Sacramento River Deep Water Ship Channel, California, during field activity 2018-684-FA: U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Type_of_Source_Media: Digital
    Source_Contribution: Bathymetric data that was used in final DEM
    Wildlands (source 3 of 15)
    Stevens, A.W., Dartnell, P., Fregoso, T.A., Lacy, J.R., and Dailey, E.T., 2020, Topography data collected in the Liberty Island Conservation Bank portion of the Cache Slough Complex, Sacramento-San Joaquin Delta, California, during USGS field activity 2017-649-FA: U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Type_of_Source_Media: Digital
    Source_Contribution: Topographic data that was used in final DEM
    LtHt Bathy (source 4 of 15)
    Snyder, A.G., Stevens, A.W., Carlson, E., and Lacy, J.R., 2016, Bathymetric measurements of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015, from personal watercraft: U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Type_of_Source_Media: Digital
    Source_Contribution: Bathymetric data that was used in final DEM
    LtHt Topo (source 5 of 15)
    Snyder, A.G., Stevens, A.W., Carlson, E., and Lacy, J.R., 2016, Topographic measurements of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015, using backpack GPS: U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Type_of_Source_Media: Digital
    Source_Contribution: Topographic data that was used in final DEM
    lidar (source 6 of 15)
    USGS, Woolpert for, 2019, CA Sacramento Delta Lidar 2017 D16; Hydro-Flattened Bare-Earth DEM: U.S. Geological Survey, Dayton, OH.

    Online Links:

    Type_of_Source_Media: Digital
    Source_Contribution: Topographic data that was used in final DEM
    water breaklines (source 7 of 15)
    USGS, Woolpert for, 2019, CA Sacramento Delta Lidar 2017 D16; Hydro Breaklines: U.S. Geological Survey, Dayton, OH.

    Online Links:

    Type_of_Source_Media: Digital
    Source_Contribution: water areas that were removed from lidar
    miner slough (source 8 of 15)
    California Department of Water Resources, 2012, MinerSlu_MultibeamPts_Jan2012: California Department of Water Resources, Sacramento, CA, contact Shawn Mayr, Shawn.Mayr@water.ca.gov, (916) 376-9664 North Central Region Office, California Department of Water Resources.

    Type_of_Source_Media: Digital
    Source_Contribution: bathymetric data used in DEM
    DWSC Multibeam (source 9 of 15)
    California Department of Water Resources, 2019, Sacramento DWSC Multibeam 08/05/19: California Department of Water Resources, Sacramento, CA, Thomas Handley, thomas.handley@water.ca.gov, 916-376-9602, North Central Region Office, California Department of Water Resources.

    Type_of_Source_Media: Digital
    Source_Contribution: bathymetric data used in DEM
    DWSC single beam (source 10 of 15)
    California Department of Water Resources, 2019, Sacramento DWSC Singlebeam 08/05/19 - 08/08/19: California Department of Water Resources, Sacramento, CA, Thomas Handley, thomas.handley@water.ca.gov, 916-376-9602, North Central Region Office, California Department of Water Resources.

    Type_of_Source_Media: Digital
    Source_Contribution: bathymetric data used in DEM
    Hastings Single Beam (source 11 of 15)
    California Department of Water Resources, 2019, Little Hastings Singlebeam 06/19/19: California Department of Water Resources, Sacramento, CA, Thomas Handley, thomas.handley@water.ca.gov, 916-376-9602, North Central Region Office, California Department of Water Resources.

    Type_of_Source_Media: Digital
    Source_Contribution: bathymetric data used in DEM
    Hastings kayak (source 12 of 15)
    California Department of Water Resources, 2019, Little Hastings Kayak 07/08/19: California Department of Water Resources, Sacramento, CA, Thomas Handley, thomas.handley@water.ca.gov, 916-376-9602, North Central Region Office, California Department of Water Resources.

    Type_of_Source_Media: Digital
    Source_Contribution: bathymetric data used in DEM
    Hastings single beam 2 (source 13 of 15)
    California Department of Water Resources, 2019, Little Hastings Singlebeam 08/23/19: California Department of Water Resources, Sacramento, CA, Thomas Handley, thomas.handley@water.ca.gov, 916-376-9602, North Central Region Office, California Department of Water Resources.

    Type_of_Source_Media: Digital
    Source_Contribution: bathymetric data used in DEM
    Army Corp 2004 (source 14 of 15)
    Sea Surveyor, Inc., 20050128, Bathymetry data from the John F. Baldwin and Stockton Deep Water Ship Channels (San Pablo Bay to Stockton) as well as the Sacramento Deep Water Ship Channel (DWSC): U.S. Army Corps of Engineers, San Francisco District, USACE, San Francisco District.

    Type_of_Source_Media: Digital and/or Hardcopy Resources
    Source_Contribution: Bathymetric data that was used in final DEM
    CBEC (source 15 of 15)
    Solutions, Environmental Data, 2009, West Delta Condition Bathymetric Surveys: Environmental Data Solutions, San Rafael, CA.

    Type_of_Source_Media: Digital and/or Hardcopy Resources
    Source_Contribution: Bathymetric data that was used in final DEM
  2. How were the data generated, processed, and modified?
    Date: 01-Aug-2019 (process 1 of 18)
    Obtained the relevant lidar tiles of the project area, stretching from the southern-most point of the Cache Slough Complex, where the Sacramento River becomes Cache Slough, and to the north, just above Little Holland Tract, just east of the Sacramento River Deep Water Ship Channel, and to the west covering most of Lindsey, Cache, and Hass Sloughs. Data sources used in this process:
    • lidar
    Data sources produced in this process:
    • lidar subset
    Date: 03-Aug-2019 (process 2 of 18)
    Removed the hydro-flattened areas of lidar 2017-18, using the water breaklines shapefile and the clip Raster tool. Data sources used in this process:
    • lidar subset, water breaklines
    Date: 15-Aug-2019 (process 3 of 18)
    Using LtHt bathy and topo, combined with the cache swath and single beam, digitized contours at .2 meters spacing to create LtHt contours. Data sources used in this process:
    • LtHt bathy, LtHt topo, Cache Swath, Cache Single Beam
    Data sources produced in this process:
    • LtHt contours
    Date: 01-Sep-2019 (process 4 of 18)
    Clipped out 5 meters of lidar 2017-18 bordering Little Holland Tract using the buffer and clip raster tools, converted area to points. Creating LtHt lidar edge points. Data sources used in this process:
    • lidar subset
    Data sources produced in this process:
    • LtHt lidar edge points
    Date: 04-Sep-2019 (process 5 of 18)
    Using LtHt lidar edge points, LtHt Bathy, and LtHt Topo, combined with the Cache Swath and Cache Single Beam, and newly digitized contours, and furthering the methods used in Fregoso and others, 2017, used ESRI's Topo to Raster tool to interpolate an updated Little Holland Track DEM. Data sources used in this process:
    • LtHt lidar edge points, LtHt Bathy, LtHt Topo, Cache Swath, Cache Single Beam, LtHt contours
    Data sources produced in this process:
    • LtHt DEM
    Date: 18-Sep-2019 (process 6 of 18)
    Pulled out necessary CBEC survey data to help constrain the DEM in Liberty Island Data sources used in this process:
    • CBEC
    Data sources produced in this process:
    • CBEC subset
    Date: 20-Sep-2019 (process 7 of 18)
    Using Cache Swath and Cache Single Beam, and CBEC subset data, digitized Liberty contours at .2 meters spacing. Data sources used in this process:
    • Cache Swath, Cache Single Beam, CBEC
    Data sources produced in this process:
    • Lib contours
    Date: 20-Sep-2019 (process 8 of 18)
    Clipped out 5 meters of lidar 2017-18 bordering Liberty Island, converted them to points. Creating Liberty Island lidar edge points. Data sources used in this process:
    • lidar subset
    Data sources produced in this process:
    • Lib edge points
    Date: 25-Sep-2019 (process 9 of 18)
    Using Cache Swath and Cache Single Beam, and CBEC subset data, Liberty Island lidar edge points, and digitized contours, used ESRI's Topo to Raster tool to interpolate a Liberty Island DEM. Data sources used in this process:
    • Lib lidar edge points, Cache Swath, Cache Single Beam, CBEC subset, Lib contours
    Data sources produced in this process:
    • Lib DEM
    Date: 01-Nov-2019 (process 10 of 18)
    Using methods developed in chapter 5 'A Revised Continuous Surface Elevation Model for Modeling' in the 2018 Department of Water Resources Annual Report, Cache Swath and Cache Single Beam, Wildlands, DWR surveys, and lidar were used to create DEMs of Lindsey, Hass, Cache Sloughs, Little Hastings Tract, Wildlands, Prospect Slough, and the Sacramento River Deep Water Ship Channel areas. Person who carried out this activity:
    Rueen-Fang Wang
    California Department of Water Resources, Bay-Delta Office
    1416 9th Street
    Sacramento, CA

    (916)654-3755 (voice)
    Rueen-Fang.Wang@water.ca.gov
    Data sources used in this process:
    • Cache Swath, Cache Single Beam, Wildlands, lidar subset, miner slough, DWSC multibeam, DWSC single beam, Hastings single beam, Hastings single beam 2, Hastings kayak
    Data sources produced in this process:
    • Lindsey DEM, Hass DEM, Cache Slough DEM, Little Hastings Tract DEM, Wildlands DEM, Prospect Slough DEM, Deep Water Ship Channel DEM
    Date: 15-Nov-2019 (process 11 of 18)
    Using the 2004 U.S. Army Corps of Engineers (ACOE) survey of the Sacramento River, contours were digitized every meter to create 2004 contours. Data sources used in this process:
    • Army Corp 2004
    Data sources produced in this process:
    • ACOE contours
    Date: 15-Nov-2019 (process 12 of 18)
    A 5-meter-wide portion of lidar was converted to points adjacent to the necessary 2004 ACOE data. Data sources used in this process:
    • lidar subset
    Data sources produced in this process:
    • ACOE edge points
    Date: 15-Nov-2019 (process 13 of 18)
    The 2004 ACOE data, the digitized 2004 contours, and 2004 lidar adjacent points were interpolated into a DEM using the Topo to Raster tool. Data sources used in this process:
    • Army Corp 2004, ACOE contours, ACOE edge points
    Data sources produced in this process:
    • ACOE DEM
    Date: 05-Dec-2019 (process 14 of 18)
    There were gaps between the Cache Swath data and the lidar in the areas of Shag Slough, Liberty Cut, and the northern boundaries of Liberty Island and Little Holland Tract. A 5-meter-wide portion of lidar 2017-18 adjacent to areas with gaps were converted to lidar edge points, and a 2-meter border of the Cache Swath data near Liberty Island was converted into swath edge points. Data sources used in this process:
    • lidar subset
    Data sources produced in this process:
    • lidar edge points, swath edge points
    Date: 10-Dec-2019 (process 15 of 18)
    Using the Topo to Raster tool, the lidar edge points and the swath edge points were interpolated to fill in data gaps to create an edge DEM. Data sources used in this process:
    • lidar edge points, swath edge points
    Data sources produced in this process:
    • Edge DEM
    Date: 13-Jan-2020 (process 16 of 18)
    Individually created DEMS and lidar were mosaiced together using the Mosaic to New Raster tool, resulting in the Cache Slough Complex amd DWSC DEM. Data sources used in this process:
    • lidar, Lib DEM, LtHt DEM, Lindsey DEM, Hass DEM, Cache Slough DEM, Little Hastings Tract DEM, Wildlands DEM, Prospect Slough DEM, Deep Water Ship Channel DEM, ACOE DEM, Edge DEM
    Date: 19-Oct-2020 (process 17 of 18)
    Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 13-Oct-2021 (process 18 of 18)
    Performed minor edits to the metadata to correct typos. No data were changed. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Susan A. Cochran
    Geologist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7545 (voice)
    scochran@usgs.gov
  3. What similar or related data should the user be aware of?
    Fregoso, T.A., Wang, R-F., Ateljevich, E., and Jaffe, B.E., 2017, A new seamless, high-resolution digital elevation model of the San Francisco Bay-Delta Estuary, California.

    Online Links:

    Environmental Systems Research Institute, Inc (ESRI), 2015, Topo to Raster help page.

    Online Links:

    Wang, R-F., and Ateljevich, E., 2018, A continuous surface elevation map for modeling, chapter 5 in California Department of Water Resources, Methodology for flow and salinity estimates in the Sacramento-San Joaquin Delta and Suisun Marsh, 39rd Annual Progress Report to the State Water Resources Control Board: California Department of Water Resources, Sacramento, CA.

    Online Links:

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    No formal attribute accuracy tests were conducted.
  2. How accurate are the geographic locations?
    A formal accuracy assessment of the horizontal positional information in the data set has not been conducted.
  3. How accurate are the heights or depths?
    A formal accuracy assessment of the vertical positional information in the data set has either not been conducted, or is not applicable.
  4. Where are the gaps in the data? What is missing?
    Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    No formal logical accuracy tests were conducted.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None
Use_Constraints:
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey and U.S. Bureau of Reclamation as the originators of the dataset and in products derived from these data. This information is not intended for navigation purposes.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO
    US

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? This data is available as a GeoTiff (DEM_CacheSloughComplex_2020_NAVD88_u83_meters.tif) with accompanying files and FGDC-compliant metadata.
  3. What legal disclaimers am I supposed to read?
    Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    These data can be viewed with ArcGIS software.

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2021
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_P9AQSRVH/DEM_CacheSloughComplex_2020_NAVD88_u83_meters_metadata.faq.html>
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