Bathymetry of Whales Tail Marsh tidal creeks, South San Francisco Bay, California, 2023

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Andrew W. Stevens
Originator: Daniel J. Nowacki
Publication_Date: 20240807
Title:

Bathymetry of Whales Tail Marsh tidal creeks, South San Francisco Bay, California, 2023

Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P17ZUBYC

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P17ZUBYC
Larger_Work_Citation:

Citation_Information:

Originator: Joanne C.T. Ferreira
Originator: Daniel J. Nowacki
Originator: Andrew W. Stevens
Publication_Date: 2024
Title:

Oceanographic, water-quality, bathymetric, and discharge data from Whales Tail Marsh tidal creeks, South San Francisco Bay, California, 2021-2023

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P17ZUBYC

Publication_Information:

Publication_Place: Santa Cruz, CA
Publisher: U.S. Geological Survey

Other_Citation_Details:

Suggested Citation: Ferreira, J.C.T., Nowacki, D.J., Stevens, A.W., 2024, Oceanographic, water-quality, bathymetric, and discharge data from Whales Tail Marsh tidal creeks, South San Francisco Bay, California, 2021-2023: U.S. Geological Survey data release, https://doi.org/10.5066/P17ZUBYC.

Online_Linkage: https://doi.org/10.5066/P17ZUBYC

Description:

Abstract:

Bathymetric data collected in Whales Tail Marsh tidal creeks, South San Francisco Bay, California, in 2023 with a shallow draft vessel equipped with a single-beam sonar system and global navigation satellite system (GNSS) receiver. The bathymetric data are provided in a comma-separated text file.

Purpose:

Data were obtained to characterize the depths of shallow tidal creeks in the Whales Tale Marsh complex. These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to identify topographic and shallow-water bathymetric features.

Supplemental_Information:

Additional information about the field activities from which these data were derived are available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2023-681-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20231214

Currentness_Reference: ground condition at time data were collected

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.144428
East_Bounding_Coordinate: -122.137516
North_Bounding_Coordinate: 37.592110
South_Bounding_Coordinate: 37.582248

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:e15f1c37-c9af-42a5-8938-21db5245d720

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: bathymetry
Theme_Keyword: bathymetry measurement
Theme_Keyword: GPS measurement
Theme_Keyword: sea-floor characteristics
Theme_Keyword: marine geophysics
Theme_Keyword: single-beam echo sounder

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Bathymetry and Elevation

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: Global Positioning System (GPS) observations

Theme:

Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: Water Depth
Theme_Keyword: Global Positioning System (GPS)
Theme_Keyword: Echo Sounders

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Alameda County
Place_Keyword: San Francisco Bay
Place_Keyword: State of California

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Cargill Marsh
Place_Keyword: Whales Tail Marsh
Place_Keyword: Whales Tail South Marsh
Place_Keyword: Eden Landing Ecological Reserve

Access_Constraints: no access constraints
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 as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigational purposes.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: PCMSC Science Data Coordinator
Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: cg23_overview_image.png
Browse_Graphic_File_Description:

Map showing locations of bathymetric survey tracklines color-coded by elevation and equipment used during the bathymetric survey

Browse_Graphic_File_Type: PNG

Native_Data_Set_Environment: MATLAB 9.13.0.2080170, Adobe Photoshop version 25.7.0
Cross_Reference:

Citation_Information:

Originator: International Hydrographic Organization (IHO)
Publication_Date: 2008
Title: IHO standards for hydrographic surveys (5th ed.)
Geospatial_Data_Presentation_Form: comma-delimited text
Publication_Information:

Publication_Place: Monaco
Publisher: International Hydrographic Bureau Special Publication 44, 28p.

Cross_Reference:

Citation_Information:

Originator: Rydlund, P.H.
Originator: Densmore, D.K.
Publication_Date: 2012
Title:

Methods of practice and guidelines for using survey-grade global navigation satellite systems (GNSS) to establish vertical datum in the United States Geological Survey.

Online_Linkage: https://pubs.usgs.gov/tm/11d1/tm11-D1.pdf

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted.

Logical_Consistency_Report: All data falls within expected ranges.
Completeness_Report:

Dataset 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.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Survey-grade positions of the survey vessel was achieved with global navigation satellite system (GNSS) receivers and a single GNSS base station placed on a benchmark. The position of the benchmark was determined using multiple static occupations resulting in a final position that conforms to level 1 quality (Rydlund and Densmore, 2012). Positioning data from the survey vessel were post-processed using Waypoint Grafnav software to apply differential corrections from the GNSS base station. Manufacturer reported accuracy for the differentially corrected horizontal positions for the GNSS rover trajectories is 0.8 cm + 0.5 ppm. Baselines from the GNSS base station varied between 85 m and 1.3 km with a mean of about 600 m, suggesting the average horizontal accuracy of survey vessel positions to be about 1 cm. Uncertainty in the horizontal positions associated with pitch and roll of the survey vessel is unknown.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Uncertainty in the final elevations is derived from the combination of uncertainty in the GNSS positioning and bathymetric sounding measurements. Uncertainty in the elevation of the geodetic benchmark used in the survey is less than 2 cm based on analysis of repeated static occupations. Manufacturer reported accuracy for the differentially corrected vertical positions for the GNSS rover trajectories is 1.5 cm + 1 ppm relative to the benchmark elevation. Baselines from the GNSS base station varied between 85 m and 1.3 km with a mean of about 600 m, suggesting the average vertical accuracy of survey vessel positions to be about 1.6 cm. The manufacturer of the single-beam echosounder used in this study reports a vertical accuracy of 1 cm. Additional uncertainty in the final computed elevations data is related to unmeasured variability in the speed of sound used to compute depths from bathymetric soundings and, thus, is depth-dependent. Based on analysis of available speed of sound measurements, we estimate uncertainties in the final depth soundings to be no greater than 1 percent of the water depth. The total vertical uncertainty is calculated using the constant- and depth-dependent factors summed in quadrature (International Hydrographic Organization, 2008). The mean uncertainty in processed elevations is estimated to be about 4 cm. Additional uncertainty in the vertical positions associated with pitch and roll of the survey vessels or the presence of submerged vegetation is unknown.

Lineage:

Process_Step:

Process_Description:

Bathymetry data were collected on December 14, 2023, using a single-beam sonar system and global navigation satellite system (GNSS) receiver mounted on shallow draft survey vessel. The sonar system consisted of either a CEE Hydrosystems Ceescope single-beam echosounder and 200 kHz transducer with a 9-degree beam angle. Raw acoustic backscatter returns were digitized by the echosounder with a vertical resolution of 3 mm. Depths from the echosounders were computed using sound velocity profiles measured using a YSI CastAway CTD during the survey. Positioning of the survey vessel was determined at 10 Hz using a survey-grade GNSS receiver. Output from the GNSS receiver and sonar system was combined in real time on a tablet computer running HYPACK 2020 hydrographic survey software.

Process_Date: 20231214

Process_Step:

Process_Description:

Survey-grade positions of the survey vessel were achieved with a single-base station and differential post-processing. Positioning data from the GNSS receiver were post-processed using Waypoint Grafnav to apply differential corrections from a GNSS base station with known horizontal and vertical coordinates relative to the North American Datum of 1983. Orthometric elevations relative to the NAVD88 vertical datum were computed using National Geodetic Survey Geoid18 offsets. Bathymetric data were merged with post-processed positioning data, spurious soundings were removed, and the soundings were adjusted in areas with submerged vegetation, using a custom Graphical User Interface (GUI) programmed with the computer program MATLAB 9.13.0.2080170. The final point data are projected in cartesian coordinates using the Universal Transverse Mercator (UTM), zone 10, meters coordinate system.

Process_Date: 20240201

Process_Step:

Process_Description:

All available bathymetry data from the survey were compiled into a comma-delimited text file for distribution.

Process_Date: 20240516

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 179425

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: GRS_1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 0.01
Altitude_Distance_Units: meters
Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Attribute Table
Entity_Type_Definition:

Table containing attribute information associated with the dataset

Entity_Type_Definition_Source: Producer defined

Attribute:

Attribute_Label: datetime_utc
Attribute_Definition:

The date and time of data collection in Coordinated Universal Time (UTC).

Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2023-12-14 18:52:53.642
Range_Domain_Maximum: 2023-12-14 22:09:42.850
Attribute_Units_of_Measure: date and time in yyyy-mmm-dd HH:MM:SS.FFF format

Attribute:

Attribute_Label: longitude
Attribute_Definition:

Longitude coordinate of data point relative to the North American Datum of 1983

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -122.144428
Range_Domain_Maximum: -122.137516
Attribute_Units_of_Measure: Decimal degrees

Attribute:

Attribute_Label: latitude
Attribute_Definition:

Latitude coordinate of data point relative to the North American Datum of 1983

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 37.582248
Range_Domain_Maximum: 37.592110
Attribute_Units_of_Measure: Decimal degrees

Attribute:

Attribute_Label: easting_m
Attribute_Definition:

East coordinate of data point relative to the North American Datum of 1983, projected in the Universal Transverse Mercator (UTM), zone 10, meters coordinate system

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 575541.34
Range_Domain_Maximum: 576145.33
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: northing_m
Attribute_Definition:

North coordinate of data point relative to the North American Datum of 1983, projected in the Universal Transverse Mercator (UTM), zone 10, meters coordinate system

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 4159810.31
Range_Domain_Maximum: 4160908.00
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: ellipsoid_ht_m
Attribute_Definition: Height in meters of data point relative to the GRS80 ellipsoid
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -33.48
Range_Domain_Maximum: -30.48
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: ortho_ht_m
Attribute_Definition:

Height in meters of data point with reference to the North American Vertical Datum of 1988.

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.92
Range_Domain_Maximum: 2.08
Attribute_Units_of_Measure: meters

Overview_Description:

Entity_and_Attribute_Overview:

Bathymetric data in .csv format. The first line of the csv file is a header line and the labels are defined in the entities and attributes section.

Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - CMGDS

Contact_Address:

Address_Type: Mailing and Physical Address
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: USA

Contact_Voice_Telephone: 1-831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Resource_Description:

Bathymetry data are available as a comma-delimited text file (cg23_bathy.csv), along with associated FGDC-compliant metadata.

Distribution_Liability:

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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: comma-delimited text
Format_Version_Number: Matlab 9.13.0.2080170
Format_Specification: text
Format_Information_Content: comma-delimited text file
Transfer_Size: 13.7

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P17ZUBYC

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to cg23_bathy.csv in the Environmental Data section.

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20240807
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: PCMSC Science Data Coordinator
Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission St.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P17ZUBYC/cg23_bathy_metadata.html>