Single-beam bathymetry data collected in the Cache Slough Complex, Sacramento-San Joaquin Delta, California, during USGS field activities 2017-649-FA and 2018-684-FA

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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: Peter Dartnell
Originator: Theresa A. Fregoso
Originator: Jessica R. Lacy
Originator: Evan T. Dailey
Publication_Date: 20200224
Title:

Single-beam bathymetry data collected in the Cache Slough Complex, Sacramento-San Joaquin Delta, California, during USGS field activities 2017-649-FA and 2018-684-FA

Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9AQSRVH

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/P9AQSRVH
Online_Linkage:

https://www.sciencebase.gov/catalog/item/5d7192cce4b0c4f70cff9326?name=cs17_18_singlebeam_bathy.csv

Larger_Work_Citation:

Citation_Information:

Originator: Theresa A. Fregoso
Originator: Andrew W. Stevens
Originator: Rueen-Fang Wang
Originator: Thomas Handley
Originator: Peter Dartnell
Originator: Jessica R. Lacy
Originator: Eli Ateljevich
Originator: Evan T. Dailey
Publication_Date: 2020
Title:

Bathymetry, topography, and acoustic backscatter data, and a digital elevation model (DEM) of the Cache Slough Complex and Sacramento River Deep Water Ship Channel, Sacramento-San Joaquin Delta, California

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9AQSRVH

Publication_Information:

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

Online_Linkage: https://doi.org/10.5066/P9AQSRVH
Online_Linkage:

https://www.sciencebase.gov/catalog/item/5d702b8ae4b0c4f70cfa990f

Description:

Abstract:

This portion of the USGS data release presents single beam bathymetry data collected during surveys performed in the Cache Slough Complex, Sacramento-San Joaquin Delta, California in 2017 and 2018 (USGS Field Activity Numbers 2017-649-FA and 2018-684-FA). Bathymetry data were collected using personal watercraft (PWCs) equipped with single-beam sonar systems and global navigation satellite system (GNSS) receivers. The final point data from the PWCs are provided in a comma-separated text file and are projected in cartesian coordinates using the Universal Transverse Mercator (UTM) Zone 10 North, meters coordinate system.

Purpose:

These data were collected in support of ongoing field experiments and numerical modeling with the U.S. Bureau of Reclamation to improve our understanding of habitat quality, the influence on various landscape features on ecosystem function, and the effects of restoration actions in the Sacramento-San Joaquin Delta. These data are intended for science researchers, students, policy makers, and the general public.

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=2017-649-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-684-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: 20170627
Ending_Date: 20181220

Currentness_Reference: ground condition at time data were collected

Status:

Progress: Complete
Maintenance_and_Update_Frequency: Not planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -121.7483099
East_Bounding_Coordinate: -121.6509921
North_Bounding_Coordinate: 38.3364162
South_Bounding_Coordinate: 38.2362289

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5d7192cce4b0c4f70cff9326

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: bathymetry
Theme_Keyword: bathymetry measurement
Theme_Keyword: geospatial datasets

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
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: single-beam echo sounder
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: Cache Slough
Place_Keyword: State of California
Place_Keyword: Sacramento River
Place_Keyword: San Joaquin River
Place_Keyword: Sacramento-San Joaquin Delta
Place_Keyword: Sacramento River Deep Water Ship Channel

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Cache Slough Complex

Access_Constraints: none
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:

https://www.sciencebase.gov/catalog/file/get/cs17_18_singlebeam_bathy.png

Browse_Graphic_File_Description:

Map showing tracklines for single-beam bathymetry data collected in 2017 and 2018.

Browse_Graphic_File_Type: PNG

Native_Data_Set_Environment: MATLAB Version: 9.2.0.556344 (R2017a)
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.

Online_Linkage: https://www.iho.int/iho_pubs/standard/S-44_5E.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 personal watercraft (PWCs) were achieved with global navigation satellite system (GNSS) receivers and GNSS base stations placed on nearby benchmarks with published horizontal coordinates relative to the North American Datum of 1983 (2011 realization). Positioning data from the PWCs were post-processed using Waypoint Grafnav software to apply differential corrections from the GNSS base stations. Manufacturer reported accuracy for the differentially corrected horizontal positions for the GNSS rover trajectories is 0.8 cm + 0.5 ppm. The maximum baseline from the GNSS base stations was approximately 36 km, suggesting the minimum horizontal accuracy of survey vessel positions to be about 2.6 cm. Uncertainty in the horizontal positions associated with pitch and roll of the survey vessels 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. 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. The maximum baseline from the GNSS base stations was approximately 36 km, suggesting the minimum vertical accuracy of survey vessel positions to be about 5.1 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 estimated vertical uncertainty in final elevations is 6 cm and 11 cm for water depths of 2 m and 10 m, respectively. Uncertainty in the vertical positions associated with pitch and roll of the survey vessels is unknown.

Lineage:

Process_Step:

Process_Description:

Bathymetry data were acquired during two field campaigns between 2017 and 2018 using single-beam sonar systems and global navigation satellite systems (GNSS) receivers mounted on personal watercraft (PWC). The sonar systems consisted of an Odom Echotrac CV-100 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 1.25 cm. Depths from the echosounders were computed using sound velocity profiles measured using a YSI CastAway CTD during the survey. Positioning of the survey vessels was determined at 10 Hz using survey-grade GNSS receivers. Output from the GNSS receivers and sonar systems were combined in real time on the PWC by a computer running HYPACK hydrographic survey software. Navigation information was displayed on a video monitor, allowing PWC operators to navigate along survey lines at speeds of 2 to 3 m/s.

Process_Date: 20181220

Process_Step:

Process_Description:

Survey-grade positions of the PWCs were achieved using differential post-processing and data from nearby GNSS base stations. Positioning data from the GNSS receivers 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 (2011 realization). Orthometric elevations relative to the NAVD88 vertical datum were computed using National Geodetic Survey Geoid12b offsets. Bathymetric data were merged with post-processed positioning data, spurious soundings were removed, and raw soundings were corrected in areas of dense aquatic vegetation using a custom Graphical User Interface (GUI) programmed with the computer program MATLAB.

Process_Date: 20190131

Process_Step:

Process_Description:

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

Process_Date: 20190910

Process_Step:

Process_Description:

Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.

Process_Date: 20201019
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description:

Performed minor edits to the metadata to correct typos. No data were changed.

Process_Date: 20211013
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Susan A. Cochran

Contact_Position: Geologist
Contact_Address:

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

Contact_Voice_Telephone: 831-460-7545
Contact_Electronic_Mail_Address: scochran@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: 1683666

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: 0.01
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: area
Attribute_Definition:

Designation of sub-area within the Cache Slough Complex survey area

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Cache Slough
Enumerated_Domain_Value_Definition: Cache Slough sub-area
Enumerated_Domain_Value_Definition_Source: producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Liberty Island
Enumerated_Domain_Value_Definition: Liberty Island sub-area
Enumerated_Domain_Value_Definition_Source: producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Little Holland
Enumerated_Domain_Value_Definition: Little Holland Tract sub-area
Enumerated_Domain_Value_Definition_Source: producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Wildlands
Enumerated_Domain_Value_Definition: Wildlands sub-area
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).

Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2017-06-27 15:40:30.193
Range_Domain_Maximum: 2018-12-20 00:12:02.461
Attribute_Units_of_Measure: date and time in mm/dd/yyyy HH:MM:SS.FFF format

Attribute:

Attribute_Label: longitude
Attribute_Definition:

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