gov.noaa.nmfs.inport:47861 eng UTF8 dataset Office for Coastal Management resourceProvider NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact 2026-06-19T19:23:09 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) San Francisco Bay Multi-beam Backscatter Imagery: Area A ca_sfb14_mbs_imagery-A-meta publication NOAA/NMFS/EDM 47861 https://www.fisheries.noaa.gov/inport/item/47861 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information mapDigital Backscatter imagery data were collected over shallow subtidal areas in the San Francisco Bay estuary system. Bathymetric and acoustic backscatter data were collected simultaneously in 84 survey blocks. Seventy five of these blocks were surveyed with 100% cover of backscatter imagery and nine blocks were surveyed with 50% backscatter coverage. These data were collected as source material for planned benthic habitat mapping. An earlier project had been completed to map the very-shallow subtidal and intertidal areas. These mosaics were collected with the Reson Seabat 7101 multibeam sonar system in the San Francisco Bay. For this San Francisco Bay habitat mapping project, seven survey blocks were acquired with the Reson 7101 sonar, as these seven areas contained water depths that were predominantly deeper than 20 meters. Original contact information: Contact Name: Jen Eckerle Contact Org: California Ocean Protection Council (OPC) Title: Deputy Director, OPC Phone: 916-653-9416 Email: jen.eckerle@resources.ca.gov The primary purpose of this acoustic backscatter acquisition is to provide the California Ocean Protection Council (OPC), as required for the California Seafloor Mapping Program (CSMP) modern, accurately positioned sonar imagery data of San Francisco Bay coastal and near shore waters to delineate marine habitat types. Secondarily, the survey shall provide OPC and NOAA with bathymetric survey data from a combination of multi-beam and interferometric sonars. The combined survey data, including the imagery and the bathymetry, will support OPC's goals as well as assist with NOAA's mandate for port and harbor maintenance (dredging), coastal engineering (beach erosion and replenishment studies), and coastal zone management. California Ocean Protection Council (OPC) and Fugro Pelagos, Inc. completed NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information custodian asNeeded EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > COASTAL EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > ESTUARY theme Global Change Master Directory (GCMD) Science Keywords 23.3 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA place Global Change Master Directory (GCMD) Location Keywords 23.3 California Contra Costa County Marin County San Francisco Bay San Francisco County San Mateo County Solano County United States place Geographic Names Information System California Ocean Protection Council California Seafloor Mapping Program (CSMP) Reson Seabat 7101 multibeam backscatter imagery theme DOC/NOAA/NOS/OCM > Office of Coastal Management, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2026. GCMD Keywords, Version 24. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Benthic project InPort otherRestrictions Cite As: Office for Coastal Management, [Date of Access]: San Francisco Bay Multi-beam Backscatter Imagery: Area A [Data Date Range], https://www.fisheries.noaa.gov/inport/item/47861. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None otherRestrictions Use Constraints: These multi-beam backscatter mosaic images depict the existing conditions of the seafloor at the time of the survey and are only accurate for that time. Use of these products is to be determined by the California Ocean Protection Council. unclassified grid eng; US geoscientificInformation imageryBaseMapsEarthCover oceans Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.1.3143 -122.457918 -122.22641 37.707297 38.066568 | Currentness: Ground Condition 2014-12-10 2014-12-21 Seven survey blocks in Area A were acquired with a Reson 7101 multibeam sonar. The multi-beam backscatter imagery products are organized by these blocks. The blocks represent the priority areas determined by the project partners and were arranged to avoid areas where data had already been collected. Data for each block was collected on the following dates. Block CA1B08 was acquired between 12/21/2014 and 12/21/2014. Block CA1B09 was acquired between 12/21/2014 and 12/21/2014. Block CA1B22 was acquired between 12/13/2014 and 12/16/2014. Block CA1B24 was acquired between 12/10/2014 and 12/13/2014. Block CA1B26 was acquired between 12/14/2014 and 12/15/2014. Block NA1B15 was acquired between 12/16/2014 and 12/21/2014. Block NA1B23 was acquired between 12/18/2014 and 12/18/2014. NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information distributor https://ocmgeodatastor1.blob.core.windows.net/benthic-data/Benthic/Multi-Beam_Sonar_Backscatter_Data/CA_SanFranciscoBay_mbs-A.zip WWW:LINK-1.0-http--link https://ocmgeodatastor1.blob.core.windows.net/benthic-data/Benthic/Multi-Beam_Sonar_Backscatter_Data/CA_SanFranciscoBay_mbs-A.zip download dataset Accuracy The attributes of these data include positioning and backscatter intensity values. Horizontal Positional Accuracy Multi-beam data met IHO Order 1A specifications, meaning the horizontal accuracy of multibeam data had to be within 5 meters + 5% of depth. The actual horizontal accuracy of the backscatter imagery exceeded these requirements, as the navigation/position data for the vessel was post-processed using an Applanix SmartBase post-processed kinematic solution, resulting in vessel horizontal positioning RMS values under 5 centimeters. Likewise, the vessel equipment offsets were measured to an accuracy of approximately 1 centimeter (1 sigma level) using a Total Station. Vessel roll and pitch were measured to an accuracy of approximately 0.02 degrees (1 sigma level) using an Applanix POS MV. These factors created highly accurate horizontal positioning of the multibeam backscatter data that exceeded IHO Order 1A standards. Overlapping features in the backscatter data were examined visually to confirm accuracy standards were met.; Quantitative Value: 0.6 meters, Test that produced the value: Maximum Total Propagated Uncertainty in meters Vertical Positional Accuracy N/A - no vertical accuracy can be attributed to the imagery product. Completeness Report This data set was derived by mosaicking together lines in each survey block to generate a series of backscatter images throughout the survey area. No survey blocks contain missing data. Conceptual Consistency Overlapping data sets were analyzed for agreement. Imagery was visually inspected for artifacts and noise within each survey block. Multi-beam backscatter data acquisition. These backscatter data were acquired in S7K files using a Reson Seabat 7101. Multi-beam backscatter processing. The bathymetry was processed in CARIS HIPS software to generate a Generic Sensor Format (GSF) file for each survey line. The GSF and S7K files were paired together in GeoCoder software to process the backscatter for each survey block. During processing in GeoCoder, the each group of survey lines was corrected for acquisition parameters, such as power, gain, and range settings. The resulting normalized backscatter was mosaicked at 0.5 meter resolution and output to geo-tiff format in greyscale color. 2014-12-01T00:00:00 Backscatter data processing. The bathymetry was processed in CARIS HIPS software to generate a Generic Sensor Format (GSF) file for each survey line. The GSF and S7K files were paired together in GeoCoder software to process the backscatter for each survey block. During processing in GeoCoder, the backscatter values were normalized across factors such as power, gain, and range settings. This area-based processing allowed for export of a geo-tiff mosaic at 0.5 meter resolution. More detailed information on data processing can be found in the project Data Acquisition and Processing Report NCNP0000-14-01192_DAPR.pdf 2015-03-31T00:00:00