Orthomosaic images from UAS surveys of the beaches at Fort Stevens State Park, OR, and Cape Disappointment State Park, WA, August 2017
This portion of the data release presents high-resolution orthomosaic images of the ocean beach at Fort Stevens State Park, OR, and Benson Beach at Cape Disappointment State Park, WA. The orthomosaics have resolutions of 5 centimeters per pixel and were derived from structure-from-motion (SfM) processing of aerial imagery collected with unoccupied aerial systems (UAS) during low tide surveys on 7 and 8 August 2017. The raw imagery used to create the orthomosaics was acquired with a UAS fitted with a Ricoh GR II digital camera featuring a global shutter. The UAS was flown on pre-programmed autonomous flight lines spaced to provide approximately 70 percent overlap between images from adjacent lines. The camera was triggered at 1 Hz using a built-in intervalometer. The raw imagery was geotagged using positions from the UAS onboard single-frequency autonomous GPS. Survey control was established using temporary ground control points (GCPs) consisting of a combination of small square tarps with black-and-white cross patterns and temporary chalk marks placed on the ground. The GCP positions were measured using dual-frequency post-processed kinematic (PPK) GPS with corrections referenced to a static base station operating nearby. The images and GCP positions were used for structure-from-motion (SfM) processing to create topographic point clouds, high-resolution orthomosaic images, and DSMs. The orthomosaic images have been provided in a three-band RGB format, with 8-bit unsigned integer values compressed using high-quality JPEG compression and are formatted as cloud optimized GeoTIFFs with internal overviews and masks to facilitate cloud-based queries and display.
Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[
"010:12"
]
|
| contactPoint |
{
"fn": "PCMSC Science Data Coordinator",
"@type": "vcard:Contact",
"hasEmail": "mailto:pcmsc_data@usgs.gov"
}
|
| description | This portion of the data release presents high-resolution orthomosaic images of the ocean beach at Fort Stevens State Park, OR, and Benson Beach at Cape Disappointment State Park, WA. The orthomosaics have resolutions of 5 centimeters per pixel and were derived from structure-from-motion (SfM) processing of aerial imagery collected with unoccupied aerial systems (UAS) during low tide surveys on 7 and 8 August 2017. The raw imagery used to create the orthomosaics was acquired with a UAS fitted with a Ricoh GR II digital camera featuring a global shutter. The UAS was flown on pre-programmed autonomous flight lines spaced to provide approximately 70 percent overlap between images from adjacent lines. The camera was triggered at 1 Hz using a built-in intervalometer. The raw imagery was geotagged using positions from the UAS onboard single-frequency autonomous GPS. Survey control was established using temporary ground control points (GCPs) consisting of a combination of small square tarps with black-and-white cross patterns and temporary chalk marks placed on the ground. The GCP positions were measured using dual-frequency post-processed kinematic (PPK) GPS with corrections referenced to a static base station operating nearby. The images and GCP positions were used for structure-from-motion (SfM) processing to create topographic point clouds, high-resolution orthomosaic images, and DSMs. The orthomosaic images have been provided in a three-band RGB format, with 8-bit unsigned integer values compressed using high-quality JPEG compression and are formatted as cloud optimized GeoTIFFs with internal overviews and masks to facilitate cloud-based queries and display. |
| distribution |
[
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|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_642f4c34d34ee8d4add512f1 |
| keyword |
[
"Bathymetry and Elevation",
"Benson Beach",
"CHMRP",
"Cape Disappointment",
"Clatsop County",
"Clatsop Spit",
"Coastal and Marine Hazards and Resources Program",
"Columbia River",
"Fort Stevens",
"North Head",
"PCMSC",
"Pacific Coastal and Marine Science Center",
"Pacific County",
"Pacific Ocean",
"State of Oregon",
"State of Washington",
"Structure-from-motion",
"U.S. Geological Survey",
"UAS",
"USGS",
"USGS:642f4c34d34ee8d4add512f1",
"Unmanned aerial system",
"aerial and satellite photography",
"aerial photography",
"altimetry",
"elevation",
"geomorphology",
"geoscientificInformation",
"geospatial datasets",
"image mosaics",
"orthophotography",
"photography",
"remote sensing",
"topographic maps",
"topography"
]
|
| modified | 2023-11-07T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -124.08829, 46.19996, -123.99237, 46.29986 |
| theme |
[
"Geospatial"
]
|
| title | Orthomosaic images from UAS surveys of the beaches at Fort Stevens State Park, OR, and Cape Disappointment State Park, WA, August 2017 |
