Topography data collected in the Liberty Island Conservation Bank portion of the Cache Slough Complex, Sacramento-San Joaquin Delta, California, during USGS field activity 2017-649-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:

Topography data collected in the Liberty Island Conservation Bank portion of the Cache Slough Complex, Sacramento-San Joaquin Delta, California, during USGS field activity 2017-649-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/5d7810e1e4b0c4f70d020cdb?name=cs17_backpack_topo.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 topography data acquired in the Liberty Island Conservation Wildlands restoration site in 2017 (USGS Field Activity Number 2017-649-FA). Topographic data were collected on June 26 and 27, 2017 by walking with global navigation satellite system (GNSS) receivers mounted on backpacks. Hand-held data collectors were used to log raw data and display navigational information as the surveyors traversed the landscape. The final point data 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 activity from which these data were derived are available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-649-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: 20170626
Ending_Date: 20170627

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: -121.6742286
East_Bounding_Coordinate: -121.6678300
North_Bounding_Coordinate: 38.3359344
South_Bounding_Coordinate: 38.3267719

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5d7810e1e4b0c4f70d020cdb

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: topography
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: altimetry

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: Liberty Island
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_backpack_topo.png

Browse_Graphic_File_Description: Map showing tracklines for topography data collected in 2017
Browse_Graphic_File_Type: PNG

Native_Data_Set_Environment: MATLAB Version: 9.6.0.1150989 (R2019a)

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 during the topographic surveys were achieved with global navigation satellite system (GNSS) receivers and a GNSS base station placed on a benchmark with coordinates relative to the North American Datum of 1983 (2011 realization). The position and elevation of the benchmark was derived from three static GNSS occupations on June 26-28, 2017 with durations between 4 and 8 hours. The equipment for the static occupations consisted of a Trimble R7 GNSS receiver, a fixed-height tripod, and Trimble Geodetic Model 2 antenna. The static observations were processed using the National Geodetic Survey Online Positioning User Service (OPUS). The processed positions from each occupation were averaged (standard deviation individual horizontal positions were less than 1 cm) to derive the final position of the benchmark. Positioning data from the topographic surveyors were post-processed using Trimble Business center 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. The maximum baseline from the GNSS base stations was approximately 3 km, suggesting the minimum horizontal accuracy of survey vessel positions to be about 1 cm. Uncertainty in the horizontal positions associated with surveyor posture are unknown.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Survey-grade positions during the topographic surveys were achieved with global navigation satellite system (GNSS) receivers referenced to a GNSS base station placed on a benchmark with coordinates relative to the North American Datum of 1983 (2011 realization). The uncertainty of the elevation of the benchmark, derived as described above, is estimated to be 1 cm. Positioning data from the topographic surveyors were post-processed using Trimble Business center software to apply differential corrections from the GNSS base station. Manufacturer reported accuracy for the differentially corrected vertical positions for the GNSS rover trajectories is 1.5 cm + 1 ppm. The maximum baseline from the GNSS base stations was approximately 3 km, suggesting the vertical accuracy of the survey platforms to be 1.8 cm relative to the benchmark elevation. Combining the uncertainty in the base station elevation (1 cm) and rover positions yields a total estimated vertical uncertainty of 3 cm. Uncertainty in the vertical positions associated with sinking into the substrate or variable posture during data collection of the surveyors is unknown.

Lineage:

Process_Step:

Process_Description:

Topography data were collected between June 26 and June 27, 2017 on foot with GNSS equipment mounted on backpacks. A total of 3 GNSS backpacks, each equipped with a dual-frequency GNSS receiver and handheld data collector, were used during the survey. Prior to data collection, vertical distances between the GNSS antenna and the ground were measured using a tape measure for each topographic surveyor. Hand-held data collectors were used to log raw data and display navigational information as the surveyors traversed the landscape.

Process_Date: 20170628

Process_Step:

Process_Description:

Positioning data from the survey platforms were post-processed 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). Post-processing of raw GNSS data was performed with Trimble Business Center software. Orthometric elevations relative to the NAVD88 vertical datum were computed using National Geodetic Survey Geoid12a offsets. The final point data from the topographic surveyors are projected in cartesian coordinates using the Universal Transverse Mercator (UTM), Zone 10 North, meters coordinate system.

Process_Date: 20170831

Process_Step:

Process_Description:

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

Process_Date: 20190911

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: 2950 6

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: 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: 2017-06-26 19:19:13.000
Range_Domain_Maximum: 2017-06-27 22:41:28.000
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