Topographic data from two marshes and adjacent shallows in Northern San Francisco Bay, California, 2022-2023

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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: Samantha C. McGill
Originator: Andrew W. Stevens
Publication_Date: 20240806
Title:

Topographic data from two marshes and adjacent shallows in Northern San Francisco Bay, California, 2022-2023

Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P1XZFGCX

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/P1XZFGCX
Larger_Work_Citation:

Citation_Information:

Originator: Samantha C. McGill
Originator: Jessica R. Lacy
Originator: Joanne C.T. Ferreira
Originator: Daniel J. Nowacki
Originator: Andrew W. Stevens
Originator: Angela C. Tan
Publication_Date: 2024
Title:

Hydrodynamic and sediment transport data from two marshes and adjacent shallows in Northern San Francisco Bay, California 2022-2023

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P1XZFGCX

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Other_Citation_Details:

Suggested Citation: McGill, S.C., Lacy, J.R., Ferreira, J.C.T., Nowacki, D.J., Stevens, A.W., and Tan, A.C., 2024, Hydrodynamic and sediment transport data from two marshes and adjacent shallows in Northern San Francisco Bay, California 2022-2023: U.S. Geological Survey data release, https://doi.org/10.5066/P1XZFGCX.

Online_Linkage: https://doi.org/10.5066/P1XZFGCX

Description:

Abstract:

Topographic data were collected in the Corte Madera Marsh, San Pablo National Wildlife Refuge Marsh, and at the time-series stations in the shallows adjacent to each marsh in Northern San Francisco Bay between April 2022 and September 2023. The topographic data were acquired using global satellite navigation system receivers that were either mounted on backpacks and hiked over the marsh surface or mounted on a survey rod held shipside against a deployed platform or on the water surface. Sometimes an additional staff was used in conjunction with the shipside survey rod to reach the platform, which we refer to as an integrated collection method.

Purpose:

Topographic data were collected as part of a study to produce information useful for prioritizing marsh restoration sites, assessing restoration actions, and understanding mechanisms of sediment delivery to marshes. These data are intended for researchers, students, policy makers, and the general public.

Supplemental_Information:

Information about the data collection field activities can be found at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-619-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2023-603-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:

Range_of_Dates/Times:

Beginning_Date: 20220412
Ending_Date: 20230918

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: -122.5056495
East_Bounding_Coordinate: -122.472715
North_Bounding_Coordinate: 38.1186296
South_Bounding_Coordinate: 37.9285518

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:d0410af8-8e05-43a1-81bd-7e484344cce4

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: USGS Thesaurus
Theme_Keyword: topography
Theme_Keyword: GPS measurement

Theme:

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

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: San Francisco Bay
Place_Keyword: Marin County
Place_Keyword: Sonoma County
Place_Keyword: State of California
Place_Keyword: San Pablo Bay

Place:

Place_Keyword_Thesaurus: none
Place_Keyword: Corte Madera marsh
Place_Keyword: San Pablo Bay National Wildlife Refuge
Place_Keyword: Corte Madera Bay

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.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

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

Contact_Person: PCMSC Science Data Coordinator

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: Marsh_topo_pictures.png
Browse_Graphic_File_Description:

Images of both Corte Madera Marsh and San Pablo Marsh being surveyed.

Browse_Graphic_File_Type: PNG

Cross_Reference:

Citation_Information:

Originator: Paul H. Rydlund
Originator: Brenda K. Densmore
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

Other_Citation_Details:

Rydlund, P.H., Jr., and Densmore, B.K., 2012, Methods of practice and guidelines for using survey-grade global navigation satellite systems (GNSS) to establish vertical datum in the United States Geological Survey: U.S. Geological Survey Techniques and Methods, book 11, chap. D1, 102 p. with appendixes.

Online_Linkage: https://doi.org/10.3133/tm11D1

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 positioning for the topographic data were achieved with global navigation satellite system (GNSS) receivers operating in real time kinematic mode with differential corrections from a single GNSS base station placed on a benchmark with established coordinates relative to the North American Datum of 1983 (2011 realization). The position of the GNSS base station was established using two static occupations conforming to level 1 quality as defined by Rydlund and others (2012). Uncertainty in the horizontal positions of the topographic data relative to the GNSS base station were estimated during acquisition using Trimble Access software and provided for each measurement in the dataset. The estimated uncertainty in horizontal positions at the 95 percent confidence interval ranged between 0.001 and 0.114 m with a mean of 0.023 m. Uncertainty in the horizontal positions associated with variable posture of the surveyor during data collection is unknown.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Uncertainty in the elevations above the reference ellipsoid of relative to the GNSS base station were estimated during acquisition using Trimble Access software or via post processing using Trimble Business Center software. The estimated uncertainty in vertical positions at the 95 percent confidence interval ranged between 0.015 and 0.089 m with a mean of 0.043 m. Uncertainty in the horizontal positions associated with variable posture of the surveyor during data collection is unknown.

Lineage:

Process_Step:

Process_Description:

Survey grade topographic data were collected with GNSS receivers mounted on either, survey rods, backpacks, or an integrated method which used a survey rod placed above a platform or object whose elevation above bed was known. Prior to data collection, vertical distances between the GNSS antennas and the ground were measured using a tape measure. Hand-held data collectors running Trimble Access were used to log raw data and display navigational information allowing surveyors to follow planned survey lines when appropriate. The positions of the topographic platforms collected in RTK mode were retained, and Trimble Business Center software was used to apply differential corrections to topographic data collected in autonomous mode when VHF communication with the base station failed. Orthometric elevations relative to the NAVD88 vertical datum were computed for all survey platforms, using National Geodetic Survey Geoid18 offsets. Orthometric heights in the North American Vertical Datum 1988 vertical datum were computed using National Geodetic Survey Geoid18 offsets.

Process_Date: 20230918

Process_Step:

Process_Description:

Raw topographic data were imported into Trimble Business Center for inspection. All available data were exported in comma-delimited text format for distribution.

Process_Date: 20240515
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Samantha C. McGill
Contact_Organization:

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

Contact_Position: Oceanographer
Contact_Address:

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

Contact_Voice_Telephone: 831-460-7543
Contact_Electronic_Mail_Address: scmcgill@usgs.gov

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: 9714

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0000001
Longitude_Resolution: 0.0000001
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: 0.001
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: FAN ID
Attribute_Definition: U.S. Geological Survey field activity number (FAN).
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 2022-619-FA
Enumerated_Domain_Value_Definition:

Samples collected during USGS field activity 2022-619-FA. Additional information about this field activity can be found at https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-619-FA.

Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 2023-603-FA
Enumerated_Domain_Value_Definition:

Samples collected during USGS field activity 2023-603-FA. Additional information about this field activity can be found at https://cmgds.marine.usgs.gov/fan_info.php?fan=2023-603-FA.

Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute:

Attribute_Label: datetime_utc
Attribute_Definition:

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