47865 ca_sfb15_sss_imagery-B-meta Data Set Published / External 37225 Benthic Project Completed 2016 High resolution sonar data were collected over ultra-shallow areas of the San Francisco Bay estuary system. Bathymetric and acoustic backscatter data were collected simultaneously in 10 survey blocks. All of these blocks were surveyed with 100% cover of backscatter imagery. 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 using optical methods. Interferometric sidescan backscatter data were acquired using a 468 kHz Bathyswath sonar system aboard the RV MacGinitie and RV Kelpfly. Both of these platforms were well suited to acquire data in the very shallow subtidal areas of the bay. Original contact information: Contact Name: Jen Eckerle Contact Org: Ocean Protection Council (OPC) Title: Deputy Director, Ocean Protection Council Phone: 916-653-9416 Email: jen.eckerle@resources.ca.gov The primary purpose of this San Francisco Bay habitat mapping acquisition is to provide the California Ocean Protection Council (OPC), as required for the California Seafloor Mapping Program (CSMP), high-resolution accurately positioned sonar imagery data of San Francisco Bay coastal and near shore waters to delineate marine habitat types. Survey data from a combination of multi-beam and interferometric sonars, 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. 10001 Ten survey blocks in Area B were acquired with the Bathyswath sonar and the backscatter 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 NBB01 was surveyed on 11/18-19, 22, 2015; Block NBB02 on 6/6, 11/13-17, 19, 22-23, 12/10, 2015; Block NBB03 on 11/23-14, 12/7-11, 2015; Block NBB04 on 12/7, 10, 2015; Block NBB05 on 6/4-5, 11/28-29, 12/8, 11, 2015; Block CBB01/Islais Creek Channel on 5/2/2015; Block CBB02/India Basin on 5/2/2015; Block CBB03/South Basin on 5/2/2015; Block SBB01 on 3/16-18, 4/16-18, 4/30-5/1, 7/9, 8/3-4, 8/31-9/2, 2015; Block SBB02 on 4/16, 7/6-11, 9/3-5, 12/12. KF-includes RV Kelpfly surveys. Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > COASTAL Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > ESTUARY Theme ISO 19115 Topic Category elevation Theme ISO 19115 Topic Category geoscientificInformation Theme ISO 19115 Topic Category imageryBaseMapsEarthCover Theme ISO 19115 Topic Category oceans Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA Theme Backscatter Theme California Ocean Protection Council Theme California Seafloor Mapping Program (CSMP) Theme Interferometric Sonar Spatial Geographic Names Information System California Spatial Geographic Names Information System Contra Costa County Spatial Geographic Names Information System Marin County Spatial Geographic Names Information System San Francisco County Spatial Geographic Names Information System San Mateo County Spatial Geographic Names Information System Solano County Spatial Geographic Names Information System United States Office for Coastal Management Charleston SC Data Set As Needed Map (digital) California Ocean Protection Council (OPC) and Seafloor Mapping Lab (SFML) at California State University Monterey Bay Data Steward 2016 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2016 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Metadata Contact 2016 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2016 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Ground Condition -122.5032 -122.0462 38.13586 37.455 Range 2015-03-16 2015-12-12 Yes Unclassified None To be determined by the California Ocean Protection Council (OPC) and its contracting research partners. These data depict the existing condition of the seafloor at the time of survey and should be considered only accurate for that time. Acknowledgment of the California Ocean Protection Council (OPC) would be appreciated in any publications or derived products. https://ocmgeodatastor1.blob.core.windows.net/benthic-data/Benthic/Side_Scan_Sonar_Backscatter_Data/CA_SanFranciscoBay_sss-B.zip 2017-02-13 Date that the source FGDC record was last modified. 2017-11-14 Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. 2018-02-08 Partial upload of Positional Accuracy fields only. 2018-04-11 Partial upload to move data access FTP links to Distribution Info and remove broken URLs. Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.1.3143 These data are not attributed. Interferometric horizontal positioning met IHO Order 1A specifications, meaning the horizontal accuracy of the data had to be within 5 meters + 5% of depth. The actual horizontal accuracy of the bathymetry 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 laser levels and meter tapes. 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 data that exceeded IHO Order 1A standards. Features in overlapping lines in the bathymetry were examined to confirm accuracy standards were met. N/A. No vertical accuracy can be attributed to the imagery product. The data set was derived after manually rejecting erroneous soundings. The final bathymetric product was generated using a CUBE surface model of the cleaned bathymetry. Overlapping data sets were analyzed for agreement. Crossline analysis was performed to ensure IHO Order 1a standards were met at the 95% confidence level. Total propagation of uncertainty values were calculated in CARIS HIPS software to ensure standards were met or exceeded 1 Interferometric side-scan backscatter data collection. Prior to data collection, a series of planned survey lines were created using the survey navigation and planning software HYPACK (Hypack, Inc). An Applanix Position and Orientation System, Marine Vessel (POS MV 320 v4) system was used on the RV MacGinitie and a Wavemaster on the RV Kelpfly to provide position and attitude data during data collection and accounted for vessel motion such as heave, pitch, and roll (position accuracy 2m, pitch, roll and heading accuracy +/-0.02 degrees, heave accuracy +/-5% or 5cm). KGPS altitude data were used to account for tide cycle fluctuations and sound velocity profiles were collected with YSI Castaway CTDs. Data acquisition, post-processing, and final products derived from bathymetry data were handled by the Seafloor Mapping Lab at CSUMB and submitted to Fugro Pelagos for inclusion in the San Francisco Bay Habitat Mapping project. Delivered formats consist of gray-scale Geotiffs for each block. 2014-01-01T00:00:00 2 Backscatter data processing. Raw (.sxr) format Bathyswath data were post-processed in Bathyswath Swath Processor 3.10.2.0 (ITER), during which they were corrected for sound velocity and installation calibration offsets, and IAPPK Smoothed Best Estimate of Trajectory (SBET) data were applied, producing processed (.sxp) Bathyswath files. Processing and mosaicking of Bathyswath backscatter sxp data were completed using SonarWiz v6.04.001 (Chesapeake Technology, Inc). Within SonarWiz, the backscatter intensity was corrected using Empirical Gain Normalization and the position of each acoustic sample was geometrically corrected for slant-range and georeferenced to UTM Zone 10N, NAD83 (2011). After gain normalization, the backscatter data were mosaicked into 0.5m and 1m resolution images and exported in GeoTiff format. More detailed information on data processing can be found in the project Data Acquisition and Processing Report NCNP0000-14-01192_DAPR.pdf 2016-04-15T00:00:00 gov.noaa.nmfs.inport:47865 Anne Ball 2017-11-14T12:57:17 Jesse Brass 2026-06-19T19:25:24 2018-04-11 Office for Coastal Management OCM 1002 Public No No 2018-04-11 1 Year 2019-04-11