Ground control point locations for UAS surveys of the beaches at Fort Stevens State Park, OR, and Cape Disappointment State Park, WA, July 2021

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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: Joshua B. Logan
Originator: Andrew W. Stevens
Originator: Cordell D. Johnson
Publication_Date: 20230623
Title:

Ground control point locations for UAS surveys of the beaches at Fort Stevens State Park, OR, and Cape Disappointment State Park, WA, July 2021

Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9BVTVAW

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/P9BVTVAW
Online_Linkage:

https://www.sciencebase.gov/catalog/item/62e47162d34e749ac04cb78a

Larger_Work_Citation:

Citation_Information:

Originator: Joshua B. Logan
Originator: Andrew W. Stevens
Originator: Shawn R. Harrison
Originator: Cordell D. Johnson
Publication_Date: 2023
Title:

Aerial imagery and structure-from-motion data products from UAS surveys of the beaches at Fort Stevens State Park, OR, and Cape Disappointment State Park, WA

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9BVTVAW

Publication_Information:

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

Other_Citation_Details:

Suggested Citation: Logan, J.B., Stevens, A.W., Harrison, S.R., and Johnson, C.D., 2023, Aerial imagery and structure-from-motion data products from UAS surveys of the beaches at Fort Stevens State Park, OR, and Cape Disappointment State Park, WA: U.S. Geological Survey data release, https://doi.org/10.5066/P9BVTVAW.

Online_Linkage: https://doi.org/10.5066/P9BVTVAW

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 July 2021 unoccupied aerial system (UAS) surveys of the ocean beach at Fort Stevens State Park, OR, and Benson Beach at Cape Disappointment State Park, WA. Eighteen temporary ground control points (GCPs) were distributed throughout the survey area to establish survey control. The GCPs consisted of a combination of small square tarps with black-and-white cross patterns and "X" marks placed on the ground using temporary chalk. The GCP positions were measured using dual-frequency post-processed kinematic (PPK) GPS with corrections referenced to a static base station operating nearby. The GCP positions are presented in a comma-delimited text file.

Purpose:

These data were obtained to evaluate changes in shoreline position and coastal morphology. These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to identify topographic features on the sub-aerially exposed portions of the beaches surveyed.

Supplemental_Information:

Additional information about the field activity from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-632-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:

Multiple_Dates/Times:

Single_Date/Time:

Calendar_Date: 20210722

Single_Date/Time:

Calendar_Date: 20210723

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: -124.07944
East_Bounding_Coordinate: -123.99640
North_Bounding_Coordinate: 46.29649
South_Bounding_Coordinate: 46.20295

Keywords:

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: aerial and satellite photography
Theme_Keyword: altimetry
Theme_Keyword: orthophotography

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

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:62e47162d34e749ac04cb78a

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: State of Washington
Place_Keyword: State of Oregon
Place_Keyword: Pacific Ocean
Place_Keyword: Columbia River
Place_Keyword: Clatsop County
Place_Keyword: Pacific County
Place_Keyword: Cape Disappointment
Place_Keyword: Fort Stevens
Place_Keyword: Benson Beach
Place_Keyword: Clatsop Spit
Place_Keyword: North Head

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/62e47162d34e749ac04cb78a?name=F01_20210722T140528Z_RB025675.JPG&allowOpen=True

Browse_Graphic_File_Description:

Aerial image showing example of ground control point used for the UAS surveys.

Browse_Graphic_File_Type: JPEG

Native_Data_Set_Environment: Microsoft Windows 10, Trimble Access, Trimble Business Center.

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 post-processed-kinematic (PPK) 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 PPK corrections were referenced to a single GPS base station concurrently occupying a nearby benchmark with published horizontal coordinates relative to the North American Datum of 1983. The horizontal positions of the geodetic reference network meet first-order specifications established by the National Geodetic Survey with a horizontal accuracy of 2 cm or better. Manufacturer reported accuracy for the differentially corrected horizontal positions for the GNSS rover is 0.8 cm + 1 ppm. Baselines from the GNSS base station varied between 0.8 km and 5.8 km with a mean of 2.8 km, suggesting the average horizontal accuracy of rover positions to be about 1 cm. Combining the uncertainty in the benchmark and rover yields a total uncertainty of 3 cm. Uncertainty in the horizontal positions associated with tripod centering, antenna height measurement errors, and errors from the weight of the tripod settling onto the GCP tarp during data collection, and possible subsequent rebound of the center of the tarp after removal is unknown.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

GCP positions were measured using survey-grade dual-frequency GPS receivers operating in post-processed-kinematic (PPK) 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 PPK corrections were referenced to a single GPS base station concurrently occupying a nearby benchmark with published vertical coordinates relative to the North American Datum of 1983. The vertical positions of the geodetic reference network meet 2 cm local ellipsoid height specifications established by the National Geodetic Survey. Manufacturer reported accuracy for the differentially corrected vertical positions for the GNSS rover is 1.5 cm + 1 ppm. Baselines from the GNSS base station varied between 0.8 km and 5.8 km with a mean of 2.8 km, suggesting the average vertical accuracy of rover positions to be about 1.8 cm. Combining the uncertainty in the benchmark and rover yields a total uncertainty of 3.8 cm. Uncertainty in the vertical positions associated with tripod centering, antenna height measurement errors, and errors from the weight of the tripod settling onto the GCP tarp during data collection, and possible subsequent rebound of the center of the tarp after removal is unknown.

Lineage:

Process_Step:

Process_Description:

Ground control was established using ground control points (GCPs) consisting of a combination of small square tarps with black-and-white cross patterns and temporary "X" marks placed with chalk on the ground surface throughout the survey area. The GCP positions were measured using post-processed kinematic (PPK) GPS, using corrections from GPS base stations located near the survey area. For each GCP measurement the GPS receiver was placed on a fixed-height tripod and set to occupy the GCP for a minimum occupation time of one minute. Post-processing was conducted using the Trimble Business Center software package.

Process_Date: 202107
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

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: 68

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:

SPCS_Zone_Identifier: 4602
Lambert_Conformal_Conic:

Standard_Parallel: 47.33333
Standard_Parallel: 45.83333
Longitude_of_Central_Meridian: -120.50000
Latitude_of_Projection_Origin: 45.33333
False_Easting: 500000.0
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:

Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983 (EPSG:4269)
Ellipsoid_Name: GRS 1980 (EPSG:7019)
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 (EPSG:5703), derived using GEOID12B

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 Washington State Plane, South (zone 4602) coordinate system, in units of meters (EPSG:32149)