Metadata: Identification_Information: Citation: Citation_Information: Originator: Joshua B. Logan Originator: Andrew W. Stevens Originator: Cordell D. Johnson Originator: Jessica R. Lacy Publication_Date: 20200817 Title: Ground control point locations for UAS survey of the Liberty Island Conservation Bank Wildlands restoration site, Sacramento-San Joaquin Delta, California, 2018-10-23 Geospatial_Data_Presentation_Form: comma-delimited text Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9GF8R1M 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/P9GF8R1M Online_Linkage: https://www.sciencebase.gov/catalog/item/5f24b3e582cef313ed979696 Larger_Work_Citation: Citation_Information: Originator: Joshua B. Logan Originator: Andrew W. Stevens Originator: Cordell D. Johnson Originator: Jessica R. Lacy Publication_Date: 2020 Title: Aerial imagery and structure-from-motion derived data products from UAS survey of the Liberty Island Conservation Bank Wildlands restoration site, Sacramento-San Joaquin Delta, California, October 2018 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9GF8R1M Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9GF8R1M Online_Linkage: https://www.sciencebase.gov/catalog/item/5dcdc9fce4b069579760b11b Description: Abstract: This portion of the data release presents the locations of the temporary ground control points (GCPs) used for the structure-from-motion (SfM) processing of the imagery collected during the Unmanned Aerial System (UAS) survey on of the Liberty Island Conservation Bank Wildlands restoration site in the Sacramento-San Joaquin Delta on 2018-10-23. The GCPs were used to establish ground control for the survey and consisted of 24 small (80 x 80 centimeter) square tarps with black-and-white cross patterns placed on the ground surface throughout the mapping area during the survey. The GCP positions were measured using RTK GPS, with corrections from a GPS base station located approximately 3 kilometers south of the study area. The GCP positions are presented in a comma-delimited text file. Purpose: These data were collected in support of ongoing field experiments and numerical modeling by the USGS and others, with funding from 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 is available online at: http://cmgds.marine.usgs.gov/fan_info.php?fan=2018-676-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: 20181023 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: -121.6755 East_Bounding_Coordinate: -121.6677 North_Bounding_Coordinate: 38.3358 South_Bounding_Coordinate: 38.3260 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5f24b3e582cef313ed979696 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: elevation Theme_Keyword: geoscientificInformation 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: topographic maps Theme_Keyword: remote sensing Theme_Keyword: geomorphology Theme_Keyword: aerial photography Theme_Keyword: image mosaics Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: photography Theme_Keyword: remote sensing Theme_Keyword: fragile ecosystems Theme_Keyword: altimetry Theme_Keyword: wetland restoration 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: CHMRP Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: PCMSC Theme_Keyword: UAS Theme_Keyword: Unmanned aerial system Theme_Keyword: Structure-from-motion 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 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 navigation purposes. 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: https://www.sciencebase.gov/catalog/file/get/5f24b3e582cef313ed979696?name=Wildlands_2018-10-23_GCP_browse.jpg Browse_Graphic_File_Description: Images of ground control targets and map of GCPs used for the UAS survey. Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Microsoft Windows 10, Trimble Access. Cross_Reference: 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 Geospatial_Data_Presentation_Form: dataset 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/5d702b8ae4b0c4f70cfa990f Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted. Logical_Consistency_Report: No formal logical accuracy tests were conducted. 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: GCP positions were measured using survey-grade dual-frequency GPS receivers operating in real-time kinematic (RTK) mode. The GPS receivers were placed on short fixed-height tripods and set to occupy each GCP for a minimum occupation time of one-minute. The RTK corrections were referenced to a static GPS base station operating on a benchmark approximately 3 kilometers south of the survey area. The position of the benchmark was previously established using three static GPS occupations (2017-06-26 to 2017-06-28) with durations between 4 and 8 hours, processed using the National Geodetic Survey (NGS) Online Positioning User Service (OPUS). The processed positions from each static occupation were averaged (standard deviation individual horizontal positions were less than 1 cm) to derive the final position of the benchmark. Manufacturer reported accuracy for the differentially corrected horizontal positions for the GPS rover positions is 0.8 cm + 0.5 ppm. The maximum baseline from the GPS base stations was approximately 3 km, suggesting the minimum horizontal accuracy to be about 1 cm. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: GCP positions were measured using survey-grade dual-frequency GPS receivers operating in real-time kinematic (RTK) mode. The GPS receivers were placed on short fixed-height tripods and set to occupy each GCP for a minimum occupation time of one-minute. The RTK corrections were referenced to a static GPS base station operating on a benchmark approximately 3 kilometers south of the survey area. The position of the benchmark was previously established using three static GPS occupations (2017-06-26 to 2017-06-28) with durations between 4 and 8 hours, processed using the National Geodetic Survey (NGS) Online Positioning User Service (OPUS). The processed positions from each static occupation were averaged to derive the final position of the benchmark, resulting in an estimated elevation uncertainty of 1 cm. Manufacturer reported accuracy for the differentially corrected vertical positions for the GPS rover positions is 1.5 cm + 1 ppm. The maximum baseline from the GPS base stations was approximately 3 km, suggesting the minimum vertical accuracy to be about 3 cm. Uncertainty in the vertical positions associated with the weight of the tripod settling onto the GCP tarp during data collection, and possible subsequent vertical rebound of the center of the tarp after removal is unknown. Lineage: Process_Step: Process_Description: Ground control was established using twenty-four temporary ground control points (GCPs) consisting of small (80 x 80 centimeter) square tarps with black-and-white cross patterns placed on the ground surface throughout the survey area. The GCP positions were measured using survey-grade GPS receivers operating in real-time-kinematic (RTK) mode. The GPS receivers were placed on short fixed-height tripods and set to occupy each GCP for a minimum occupation time of one-minute. The RTK corrections were referenced to a static GPS base station operating on a benchmark approximately 3 kilometers south of the survey area. The position of the benchmark was previously established using the average of three static GPS occupations (2017-06-26 to 2017-06-28) with durations between 4 and 8 hours, processed using the National Geodetic Survey (NGS) Online Positioning User Service (OPUS). Process_Date: 20181023 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Joshua Logan 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: 831-460-7519 Contact_Electronic_Mail_Address: jlogan@usgs.gov 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 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: 24 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 10 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -123.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.001 Ordinate_Resolution: 0.001 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: NAD83_National_Spatial_Reference_System_2011 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: pid Attribute_Definition: Point ID Attribute_Definition_Source: producer defined Attribute_Domain_Values: Unrepresentable_Domain: A unique identification code for the point. Attribute: Attribute_Label: northing_m Attribute_Definition: Northing 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: 4242831.643 Range_Domain_Maximum: 4243908.019 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: easting_m Attribute_Definition: Easting 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: 615777.803 Range_Domain_Maximum: 616450.915 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: orthometric_ht_m Attribute_Definition: Orthometric height of data point in meters relative to the North American Vertical Datum of 1988, derived using the National Geodetic Survey GEOID12A. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.644 Range_Domain_Maximum: 6.340 Attribute_Units_of_Measure: meters Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing address Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Country: United States Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: The GCP locations are available in a comma-delimited text format. 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: Notepad++ v 7.8.6 Format_Information_Content: This file contains coordinates of GCP locations placed and measured during Wildlands UAS survey, 2018-10-23. File_Decompression_Technique: No compression applied Transfer_Size: 0.732 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5f24b3e582cef313ed979696?name=Wildlands_2018-10-23_GCP.csv Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5f24b3e582cef313ed979696 Network_Resource_Name: https://doi.org/10.5066/P9GF8R1M Access_Instructions: Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to the comma-delimited text file. The second link points to a landing page with the comma-delimited text file, metadata, and browse image. The third link points to the landing page for the entire data release, including links to pages of the various data files. Fees: None. Technical_Prerequisites: The downloadable data file is available in comma-separated values (CSV) spreadsheet format. Text editing software can be used to open the file, as well as spreadsheet programs, such as Microsoft Excel. Metadata_Reference_Information: Metadata_Date: 20201019 Metadata_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 Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998