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This portion of the data release provides the data used to develop the calibration equation for the images in Digital seafloor images and sediment grain size from the mouth of the Columbia River, Oregon and Washington, 2014 for the estimate of median grain size. This dataset includes 63 still images extracted from digital video imagery of sediment grab samples along with laboratory grain size analysis of the sediment grab samples taken from the mouth of the Columbia River, OR and WA, USA. Still images were extracted from video footage whenever the camera was resting on the sediment sample and individual sediment grains were visible and in focus. The images were used to calculate the calibration curve through auto-correlation...
Categories: Data;
Types: Citation;
Tags: Columbia River,
State of Oregon,
State of Washington,
Substrate,
estuarine processes, All tags...
geology,
geoscientificInformation,
geospatial datasets,
marine sediments,
oceans,
sediment,
sediment transport,
sediment transport,
underwater photography,
video observation,
videography, Fewer tags
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This portion of the USGS data release presents digital elevation models (DEMs) derived from bathymetric and topographic surveys conducted on the Elwha River delta in July 2018 (USGS Field Activity Number 2018-648-FA). Nearshore bathymetry data were collected using two personal watercraft (PWCs) and a kayak equipped with single-beam echosounders and survey-grade global navigation satellite systems (GNSS) receivers. Topographic data were collected on foot with survey-grade GNSS receivers mounted on backpacks. Positions of the survey platforms were referenced to a GNSS base station placed on a benchmark with known horizontal and vertical coordinates relative to the North American Datum of 1983 (CORS96 realization)...
Tags: Bathymetry and Elevation,
CMHRP,
Clallam County,
Coastal and Marine Hazards and Resources Program,
Elwha River, All tags...
GPS measurement,
Global Positioning System (GPS) observations,
Olympic Peninsula,
PCMSC,
Pacific Coastal and Marine Science Center,
Strait of Juan de Fuca,
U.S. Geological Survey,
USGS,
bathymetry,
bathymetry measurement,
digital elevation models,
elevation,
single-beam echo sounder,
topographic mapping,
topography, Fewer tags
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This portion of the USGS data release presents bathymetric data collected during surveys performed on the Elwha River delta, Washington in 2018 (USGS Field Activity Number 2018-648-FA). Bathymetric data were collected using personal watercraft (PWCs) equipped with single-beam sonar systems and global navigation satellite system (GNSS) receivers.
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bathymetry and Elevation,
CMHRP,
Clallam County,
Coastal and Marine Hazards and Resources Program,
Elwha River, All tags...
GPS measurement,
Global Positioning System (GPS) observations,
Olympic Peninsula,
PCMSC,
Pacific Coastal and Marine Science Center,
Strait of Juan de Fuca,
U.S. Geological Survey,
USGS,
bathymetry,
elevation,
marine geophysics,
sea-floor characteristics,
single-beam echo sounder, Fewer tags
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This portion of the USGS data release presents bathymetry data collected during surveys performed in the Columbia River littoral cell and mouth of the Columbia River, Washington and Oregon, in 2023 (USGS Field Activity Number 2023-644-FA). Bathymetry data were collected using four personal watercraft (PWCs) equipped with single-beam sonar systems and global navigation satellite system (GNSS) receivers. The sonar systems consisted of either an Odom Echotrac CV-100 or CEE Hydrosystems Ceescope single-beam echosounder and 200 kHz transducer with a 9-degree beam angle. Raw acoustic backscatter returns were digitized by the echosounder with a vertical resolution of 1.25 cm. Depths from the echosounders were computed...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bathymetry and Elevation,
CMHRP,
Clatsop County,
Coastal and Marine Hazards and Resources Program,
Columbia River, All tags...
Echo Sounders,
GPS (Global Positioning System),
GPS measurement,
Global Positioning System (GPS) observations,
Grays Harbor County,
PCMSC,
Pacific Coastal and Marine Science Center,
Pacific County,
Pacific Ocean,
U.S. Geological Survey,
USGS,
Water Depth,
bathymetry,
bathymetry measurement,
elevation,
marine geophysics,
sea-floor characteristics,
single-beam echo sounder, Fewer tags
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This part of the data release presents topography data from the Elwha River delta collected in July 2018. Topography data were collected on foot with global navigation satellite system (GNSS) receivers mounted on backpacks.
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bathymetry and Elevation,
CMHRP,
Clallam County,
Coastal and Marine Hazards and Resources Program,
Elwha River, All tags...
GPS measurement,
Global Positioning System (GPS) observations,
Olympic Peninsula,
PCMSC,
Pacific Coastal and Marine Science Center,
Strait of Juan de Fuca,
U.S. Geological Survey,
USGS,
elevation,
topography, Fewer tags
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