Skip to main content
Advanced Search

Folders: ROOT > ScienceBase Catalog > Pacific Coastal and Marine Science Center > Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington > Bathymetry and topography data from the Elwha River delta, Washington, May 2011 ( Show all descendants )

3 results (7ms)   

Location

Folder
ROOT
_ScienceBase Catalog
__Pacific Coastal and Marine Science Center
___Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington
____Bathymetry and topography data from the Elwha River delta, Washington, May 2011
View Results as: JSON ATOM CSV
thumbnail
This portion of the USGS data release presents topography data collected during surveys performed on the Elwha River delta, Washington, in May 2011 (USGS Field Activity Number W-04-11-PS). Topography data were collected on foot with global navigation satellite system (GNSS) equipment mounted on backpacks operating in Real-Time Kinematic (RTK) mode. A total of 3 GNSS backpacks, each equipped with a dual-frequency GNSS receiver and handheld data collector, were used during the survey. Differential corrections were transmitted at 1-Hz intervals by a VHF radio to the backpack GNSS receivers from a GNSS base station placed on a benchmark with known horizontal and vertical coordinates relative to the North American Datum...
thumbnail
This portion of the USGS data release presents bathymetry data collected during surveys performed on the Elwha River delta, Washington in May 2011 (USGS Field Activity Number W-04-11-PS). Bathymetry data were collected using two personal watercraft (PWCs), each equipped with single-beam sonar systems and global navigation satellite system (GNSS) receivers. The PWC sonar systems consisted of an Odom Echotrac CV-100 single-beam echosounder and 200 kHz transducer with a 9° 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 assuming a sound velocity profiles of 1,483 m/s. Positioning of the survey vessels was...
thumbnail
This portion of the USGS data release presents digital elevation models (DEMs) derived from bathymetric and topographic surveys conducted on the Elwha River delta, Washington, in May 2011 (USGS Field Activity Number W-04-11-PS). Nearshore bathymetry data were collected using two personal watercraft (PWCs) equipped with single-beam echosounders and survey-grade global navigation satellite system (GNSS) receivers. Topography 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) and...
    map background search result map search result map Topography data from the Elwha River delta, Washington, May 2011 Nearshore bathymetry data from the Elwha River delta, Washington, May 2011 Digital elevation models (DEMs) of the Elwha River delta, Washington, May 2011 Digital elevation models (DEMs) of the Elwha River delta, Washington, May 2011 Nearshore bathymetry data from the Elwha River delta, Washington, May 2011 Topography data from the Elwha River delta, Washington, May 2011