San Francisco Bay Multi-beam Backscatter Imagery: Area A
Office for Coastal Management
Data Set
(DS)
| ID: 47861
| Published / External
Created: 2017-11-14
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Last Modified: 2023-05-30
Project (PRJ) | ID: 37225
ID: 47861
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | San Francisco Bay Multi-beam Backscatter Imagery: Area A |
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Short Name | ca_sfb14_mbs_imagery-A-meta |
* Status | Completed |
Creation Date | |
Revision Date | |
• Publication Date | |
* » Abstract |
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 |
* Purpose |
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. |
Notes |
10019 |
Other Citation Details | |
• Supplemental Information |
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. |
DOI (Digital Object Identifier) | |
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Keywords
Theme Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC |
Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > COASTAL |
Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > ESTUARY |
ISO 19115 Topic Category | geoscientificInformation |
ISO 19115 Topic Category | imageryBaseMapsEarthCover |
ISO 19115 Topic Category | oceans |
None | California Ocean Protection Council |
None | California Seafloor Mapping Program (CSMP) |
None | multibeam backscatter imagery |
None | Reson Seabat 7101 |
Temporal Keywords
Thesaurus | Keyword |
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* Spatial Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA |
Geographic Names Information System | California |
Geographic Names Information System | Contra Costa County |
Geographic Names Information System | Marin County |
Geographic Names Information System | San Francisco Bay |
Geographic Names Information System | San Francisco County |
Geographic Names Information System | San Mateo County |
Geographic Names Information System | Solano County |
Geographic Names Information System | United States |
Stratum Keywords
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Platform Keywords
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Physical Location
• » Organization | Office for Coastal Management |
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• » City | Charleston |
• » State/Province | SC |
• Country | |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
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• Data Set Type | |
• Maintenance Frequency | As Needed |
Maintenance Note | |
» Data Presentation Form | Map (digital) |
• Entity Attribute Overview | |
Entity Attribute Detail Citation | |
Entity Attribute Detail URL | |
Distribution Liability | |
Data Set Credit | California Ocean Protection Council (OPC) and Fugro Pelagos, Inc. |
Support Roles
* » Support Role | Data Steward |
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* » Date Effective From | 2017-02-13 |
Date Effective To | |
Organization | NOAA Office for Coastal Management (NOAA/OCM) |
Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address | coastal.info@noaa.gov |
Phone | (843) 740-1202 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Distributor |
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* » Date Effective From | 2017-02-13 |
Date Effective To | |
Organization | NOAA Office for Coastal Management (NOAA/OCM) |
Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address | coastal.info@noaa.gov |
Phone | (843) 740-1202 |
Fax | |
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URL | https://coast.noaa.gov |
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Contact Instructions |
* » Support Role | Metadata Contact |
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* » Date Effective From | 2017-02-13 |
Date Effective To | |
Organization | NOAA Office for Coastal Management (NOAA/OCM) |
Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address | coastal.info@noaa.gov |
Phone | (843) 740-1202 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Point of Contact |
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* » Date Effective From | 2017-02-13 |
Date Effective To | |
Organization | NOAA Office for Coastal Management (NOAA/OCM) |
Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address | coastal.info@noaa.gov |
Phone | (843) 740-1202 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
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Extents
Currentness Reference | Ground Condition |
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Extent Group 1
Extent Description |
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Extent Group 1 / Geographic Area 1
* » W° Bound | -122.457918 |
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* » E° Bound | -122.22641 |
* » N° Bound | 38.066568 |
* » S° Bound | 37.707297 |
* » Description |
Extent Group 1 / Vertical Extent
EPSG Code | |
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Vertical Maximum |
Extent Group 1 / Time Frame 1
* » Time Frame Type | Range |
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* » Start | 2014-12-10 |
End | 2014-12-21 |
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Spatial Information
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Spatial Representation
Grid Representation Used? | Yes |
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Access Information
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Data License Statement | |
* » Security Class | Unclassified |
* Security Classification System | |
Security Handling Description | |
• Data Access Policy | |
» Data Access Procedure | |
• » Data Access Constraints |
None |
• Data 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. |
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Distribution Information
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Activity Log
Activity Time | 2017-02-13 |
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Description |
Date that the source FGDC record was last modified. |
Activity Time | 2017-11-14 |
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Responsible Party | |
Description |
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. |
Activity Time | 2018-02-08 |
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Responsible Party | |
Description |
Partial upload of Positional Accuracy fields only. |
Activity Time | 2018-04-11 |
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Description |
Partial upload to move data access FTP links to Distribution Info and remove broken URLs. |
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Technical Environment
Description |
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.1.3143 |
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Data Quality
Representativeness | |
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Accuracy |
The attributes of these data include positioning and backscatter intensity values. |
Analytical Accuracy | |
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. |
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Completeness Measure | |
Precision | |
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Field Precision | |
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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. |
» Quality Control Procedures Employed |
Data Management
» Have Resources for Management of these Data Been Identified? | |
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» Approximate Percentage of Budget for these Data Devoted to Data Management | |
» Do these Data Comply with the Data Access Directive? | |
» Is Access to the Data Limited Based on an Approved Waiver? | |
» If Distributor (Data Hosting Service) is Needed, Please Indicate | |
» Approximate Delay Between Data Collection and Dissemination | |
» If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed |
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» Actual or Planned Long-Term Data Archive Location | |
» If World Data Center or Other, Specify | |
» If To Be Determined, Unable to Archive, or No Archiving Intended, Explain |
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» Approximate Delay Between Data Collection and Archiving | |
» How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive? |
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Sources
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Process Steps
Process Step Number | 1 |
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» Description |
Multi-beam backscatter data acquisition. These backscatter data were acquired in S7K files using a Reson Seabat 7101. |
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Process Step Number | 2 |
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» Description |
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. |
Process Date/Time | 2014-12-01 00:00:00 |
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Process Step Number | 3 |
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» Description |
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 |
Process Date/Time | 2015-03-31 00:00:00 |
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Acquisition Information
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FAQs
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Child Items
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Catalog Details
Catalog Item ID | 47861 |
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Metadata Record Created By | Anne Ball |
Metadata Record Created | 2017-11-14 12:57+0000 |
Metadata Record Last Modified By | SysAdmin InPortAdmin |
» Metadata Record Last Modified | 2023-05-30 18:09+0000 |
Metadata Record Published | 2018-04-11 |
Owner Org | OCM |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2018-04-11 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2019-04-11 |
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