Metadata: 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