Metadata: 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 Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -121.6742286 Range_Domain_Maximum: -121.6678300 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: 38.3267719 Range_Domain_Maximum: 38.3359344 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 North, meters, coordinate system Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 615883.05 Range_Domain_Maximum: 616432.49 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 North, meters, coordinate system Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4242906.96 Range_Domain_Maximum: 4243922.26 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: ellipsoid_ht_m Attribute_Definition: Height in meters of data point with reference to the reference ellipsoid Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -32.24 Range_Domain_Maximum: -26.08 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: -0.42 Range_Domain_Maximum: 5.73 Attribute_Units_of_Measure: meters Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: U.S. Geological Survey - Science Base Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: Bathymetry data are available as a comma-delimited text file (cs17_backpack_topo.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 9.6.0.1150989 Format_Specification: text Format_Information_Content: comma-delimited text file Transfer_Size: 2.59 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5d7810e1e4b0c4f70d020cdb?name=cs17_backpack_topo.csv Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5d7810e1e4b0c4f70d020cdb Network_Resource_Name: https://doi.org/10.5066/P9AQSRVH Access_Instructions: Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the topographic data. The second link points to a landing page with all topographic data, metadata, and a browse graphic. The third link points to a landing page for the entire data release. Fees: None Metadata_Reference_Information: Metadata_Date: 20211013 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