Dataset description: August 2017: Ground control point locations for UAS surveys of the beaches at Fort Stevens State Park, OR, and Cape Disappointment State Park, WA

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 August 2017 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 real-time kinematic (RTK) or 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.

Version	1
Keywords	topography, aerial photography, topographic maps, image mosaics, geomorphology, geospatial datasets, remote sensing
Data types	Benchmarks
Format	comma-delimited text
Amount	0.005 MB

Location of materials and files

Public files	https://doi.org/10.5066/P9BVTVAW https://www.sciencebase.gov/catalog/file/get/64384d99d34ee8d4addf02a8?name=FortStevens_BensonBeach_2017-08_GCP_positions.csv https://www.sciencebase.gov/catalog/item/64384d99d34ee8d4addf02a8
Metadata	https://cmgds.marine.usgs.gov/metadata/pcmsc/DataReleases/ScienceBase/DR_P9BVTVAW/FortStevens_BensonBeach_2017-08_GCP_metadata.xml Outline - Questions and answers - Text - XML

Activities and equipment

Activity	Equipment
2017-666-FA	Trimble R7 GPS receiver Dan Hoover submitted