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An unmanned aerial system (UAS) was used to acquire high-resolution imagery of the intertidal zone at West Whidbey Island, Washington on June 4, 2019. This imagery was processed using structure-from-motion (SfM) photogrammetric techniques to derive a high-resolution digital surface model (DSM), orthomosaic imagery, and topographic point clouds. In order to maximize the extent of the subaerially exposed area, the survey was timed to coincide with a spring low tide occurring at approximately 18:02 Universal Coordinated Time (UTC) (11:02 Pacific Daylight Time (PDT)), with a predicted water level of -0.74 meters below mean lower-low water (MLLW) at the Sunset Beach NOAA subordinate tide station (station ID 9447951)....
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This portion of the data release presents the raw aerial imagery collected during the unmanned aerial system (UAS) survey of the intertidal zone at West Whidbey Island, WA, on 2019-06-04. The imagery was acquired using a Department of Interior-owned 3DR Solo quadcopter fitted with a Ricoh GR II digital camera featuring a global shutter. Flights using both a nadir camera orientation and an oblique camera orientation were conducted. For the nadir flights (F04, F05, F06, F07, and F08), the camera was mounted using a fixed mount on the bottom of the UAS and oriented in an approximately nadir orientation. The UAS was flown on pre-programmed autonomous flight lines at an approximate altitude of 70 meters above ground...
Tags: Bathymetry and Elevation,
CHMRP,
Coastal and Marine Hazards and Resources Program,
Hastie Lake County Park,
Island County, All tags...
PCMSC,
Pacific Coastal and Marine Science Center,
Salish Sea,
State of Washington,
Strait of Juan de Fuca,
Structure-from-motion,
U.S. Geological Survey,
UAS,
USGS,
Unmanned aerial system,
Whidbey Island,
aerial and satellite photography,
aerial photography,
altimetry,
coastal processes,
elevation,
geomorphology,
geoscientificInformation,
geospatial datasets,
image mosaics,
orthophotography,
photography,
remote sensing,
remote sensing,
structure from motion,
topographic maps,
topography, Fewer tags
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This portion of the data release presents a digital surface model (DSM) and hillshade image of the intertidal zone at West Whidbey Island, WA. The DSM has a resolution of 4 centimeters per pixel and was derived from structure-from-motion (SfM) processing of aerial imagery collected with an unmanned aerial system (UAS) on 2019-06-04. Unlike a digital elevation model (DEM), the DSM represents the elevation of the highest object within the bounds of a cell. Vegetation, buildings and other objects have not been removed from the data. In addition, data artifacts resulting from noise in the original imagery have not been removed. The raw imagery used to create the DSM was acquired using a UAS fitted with a Ricoh GR II...
Tags: Bathymetry and Elevation,
CHMRP,
Coastal and Marine Hazards and Resources Program,
Hastie Lake County Park,
Island County, All tags...
PCMSC,
Pacific Coastal and Marine Science Center,
Salish Sea,
SfM,
State of Washington,
Strait of Juan de Fuca,
Structure-from-motion,
U.S. Geological Survey,
UAS,
USGS,
Unmanned aerial system,
Whidbey Island,
aerial and satellite photography,
aerial photography,
altimetry,
coastal processes,
elevation,
geomorphology,
geoscientificInformation,
geospatial datasets,
image mosaics,
orthophotography,
photography,
remote sensing,
remote sensing,
structure from motion,
topographic maps,
topography, Fewer tags
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This data release supersedes version 1, published in 2017 under https://doi.org/10.5066/F74M93HF. Please see Version_History_P9HG8UDS.txt below for more information. The San Clemente Dam, built in the 1920s on the Carmel River in Monterey County, California, was removed during 2014 and 2015. The dam-removal project was the largest in California to date, and one of the largest in the U.S. This USGS data release presents data collected before, during, and after the removal of the dam. The data were collected to study how the river channel's topographic profiles and sediment distributions changed in response to new sediment supply after dam removal and base-level changes in the former San Clemente reservoir sediment...
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High-resolution topographic surveys were conducted at two pools on the Carmel River between 2014 and 2019 using a survey-grade total station. The Dam Reach pool (DMPOOL) is located within the Dam Reach, approximately 450 meters downstream of the former site of the San Clemente Dam. The Sleepy Hollow pool (SHPOOL) is located within the Sleepy Hollow reach, approximately 2.25 kilometers downstream of the former site of the San Clemente Dam. Both pools were surveyed in 2014, 2015, 2016, 2017, and 2019 using a total station, in conjunction with the channel cross-section surveys also conducted as part of this study (see accompanying file within this data release for topographic survey transect data). For the 2015 survey,...
Categories: Data;
Tags: Bathymetry and Elevation,
CMGP,
Carmel River,
Carmel Valley,
Coastal and Marine Geology Program, All tags...
Monterey County,
PCMSC,
Pacific Coastal and Marine Science Center,
San Clemente Dam,
U.S. Geological Survey,
USGS,
field inventory and monitoring,
gravel deposits,
inland fishery resources,
inlandWaters,
inlandWaters,
river reaches,
river systems,
topographic mapping,
topography, Fewer tags
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