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Nearshore bathymetry of the Columbia River littoral cell, Washington and Oregon, 2023 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 Digital elevation models (DEMs) of the Elwha River delta, Washington, May 2011 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... Categories: Data; Types: Citation; Tags: Bathymetry and Elevation, Echo Sounders, GPS (Global Positioning System), GPS measurement, Global Positioning System (GPS) observations, All tags... Water Depth, bathymetry, bathymetry measurement, digital elevation models, elevation, single-beam echo sounder, topographic mapping, topography, Fewer tags Nearshore bathymetry data from northern Monterey Bay, California, October 2014 This portion of the USGS data release presents bathymetry data collected during surveys performed in northern Monterey Bay, California in October 2014 (USGS Field Activity Number 2014-676-FA). Bathymetry data were collected using two personal watercraft (PWCs) equipped with single-beam sonar systems and global navigation satellite system (GNSS) receivers. The 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 using sound velocity profiles measured using a YSI CastAway CTD during the survey. Positioning... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, CMGP, Coastal and Marine Geology Program, Echo Sounders, GPS (Global Positioning System), All tags... GPS measurement, Global Positioning System (GPS) observations, Monterey Bay, Monterey County, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Santa Cruz County, U.S. Geological Survey, USGS, Water Depth, bathymetry, bathymetry measurement, elevation, single-beam echo sounder, Fewer tags Nearshore bathymetry data from the Elwha River delta, Washington, May 2012 This portion of the USGS data release presents bathymetry data collected during surveys performed on the Elwha River delta, Washington in May 2012 (USGS Field Activity Number W-03-12-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 using sound velocity profiles measured using a YSI CastAway CTD during the survey. Positioning... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, Clallam County, Echo Sounders, Elwha River, GPS (Global Positioning System), All tags... GPS measurement, Global Positioning System (GPS) observations, Olympic Peninsula, Strait of Juan de Fuca, Water Depth, bathymetry, bathymetry measurement, elevation, single-beam echo sounder, Fewer tags Digital elevation models (DEMs) of the Elwha River delta, Washington, May 2012 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 2012 (USGS Field Activity Number W-03-12-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... Categories: Data; Types: Citation; Tags: Bathymetry and Elevation, Echo Sounders, GPS (Global Positioning System), GPS measurement, Global Positioning System (GPS) observations, All tags... Water Depth, bathymetry, bathymetry measurement, digital elevation models, elevation, single-beam echo sounder, topographic mapping, topography, Fewer tags Nearshore bathymetry data from the Elwha River delta, Washington, March 2013 This portion of the USGS data release presents bathymetry data collected during surveys performed on the Elwha River delta, Washington in March 2013 (USGS Field Activity Number W-01-13-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 using sound velocity profiles measured using a YSI CastAway CTD during the survey.... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, Clallam County, Echo Sounders, Elwha River, GPS (Global Positioning System), All tags... GPS measurement, Global Positioning System (GPS) observations, Olympic Peninsula, Strait of Juan de Fuca, Water Depth, bathymetry, bathymetry measurement, elevation, single-beam echo sounder, Fewer tags Contours--Offshore Aptos, California This part of DS 781 presents data for the bathymetric contours for the Offshore of Aptos map area, California. The vector data file is included in "Contours_OffshoreAptos.zip," which is accessible from https://doi.org/10.5066/F7K35RQB. These data accompany the pamphlet and map sheets of Cochrane, G.R., Johnson, S.Y., Dartnell, P., Greene, H.G., Erdey, M.D, Dieter, B.E., Golden, N.E., Hartwell, S.R., Ritchie, A.C., Kvitek, r.G., Maier, K.L., Endris, C.A., Davenport, C.W., Watt, J.T., Sliter, R.W., Finlayson, D.P., and Krigsman, L.M., (G.R. Cochrane and S.A. Cochran, eds.), 2016, California State Waters Map Series—Offshore of Aptos, California: U.S. Geological Survey Open-File Report 2016–1025, 43 p., 10 sheets, scale... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Aptos, CMHRP, Coastal and Marine Hazards and Resources Program, Continental/Island Shelf, Fisheries, All tags... Marine Nearshore Subtidal, Marine Offshore Subtidal, Northern California Ecoregion, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Rock Substrate, Santa Cruz County, Seafloor Topography, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, Unconsolidated Mineral Substrate, bathymetry, bathymetry and elevation, bathymetry measurement, computational methods, contouring, distributions, environment, geoscientificInformation, geospatial analysis, geospatial datasets, imageryBaseMapsEarthCover, marine geophysics, oceans, sea-floor characteristics, seabed, sidescan sonar, Fewer tags Contours--Offshore Santa Cruz, California This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore Santa Cruz map area, California. The vector data file is included in "Contours_OffshoreSantaCruz.zip", which is accessible from https://doi.org/10.5066/F7TM785G. These data accompany the pamphlet and map sheets of Cochrane, G.R., Dartnell, P., Johnson, S.Y., Erdey, M.D., Golden, N.E., Greene, H.G., Dieter, B.E., Hartwell, S.R., Ritchie, A.C., Finlayson, D.P., Endris, C.A., Watt, J.T., Davenport, C.W., Sliter, R.W., Maier, K.L., and Krigsman, L.M. (G.R. Cochrane and S.A. Cochran, eds.), 2016, California State Waters Map Series—Offshore of Santa Cruz, California: U.S. Geological Survey Open-File Report 2016-1024,... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bathymetry, CMHRP, Coastal and Marine Hazards and Resources Program, Continental/Island Shelf, Marine Nearshore Subtidal, All tags... Marine Offshore Subtidal, Northern California Ecoregion, Ocean Floor Topography, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Rock Substrate, Santa Cruz, Santa Cruz County, Seafloor Topography, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, USGS:556e11ebe4b0d9246a9f9a7b, Unconsolidated Mineral Substrate, bathymetry, bathymetry and elevation, bathymetry measurement, distributions, environment, geoscientificInformation, imageryBaseMapsEarthCover, marine geophysics, marine geophysics, oceans, seabed, sidescan sonar, sonar methods, Fewer tags Bathymetry Hillshade--Offshore Pigeon Point, California This part of DS 781 presents data for the shaded-relief bathymetry map of Offshore Pigeon Point, California. The raster data file is included in "BathymetryHS_OffshorePigeonPoint.zip", which is accessible from https://doi.org/10.5066/F7513W80. These data accompany the pamphlet and map sheets of Cochrane, G.R., Watt, J.T., Dartnell, P., Greene, H.G., Erdey, M.D., Dieter, B.E., Golden, N.E., Johnson, S.Y., Endris, C.A., Hartwell, S.R., Kvitek, R.G., Davenport, C.W., Krigsman, L.M., Ritchie, A.C., Sliter, R.W., Finlayson, D.P., and Maier, K.L. (G.R. Cochrane and S.A. Cochran, eds.), 2015, California State Waters Map Series—Offshore of Pigeon Point, California: U.S. Geological Survey Open-File Report 2015–1232, pamphlet... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Ano Nuevo, Bathymetry, CMHRP, Coastal and Marine Hazards and Resources Program, Continental/Island Shelf, All tags... Fisheries, Marine Nearshore Subtidal, Marine Offshore Subtidal, Northern California Ecoregion, Ocean Floor Topography, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Pigeon Point, Rock Substrate, San Mateo County, Seafloor Character, Seafloor Topography, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, USGS:5548050ae4b0a658d795441d, Unconsolidated Mineral Substrate, bathymetry, bathymetry and elevation, bathymetry measurement, distributions, ecosystems, environment, geology, geoscientificInformation, geospatial datasets, imageryBaseMapsEarthCover, maps and atlases, marine geophysics, multibeam echo sounder, multibeam sonar, oceans, seabed, sonar methods, Fewer tags Quality-assurance points, Morris Lake (Newton Reservoir), New Jersey, 2018 This dataset contains the point depth measurements used for quality assurance of the bathymetric survey of Morris Lake conducted in April 2018. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Geospatial Applications, Hydrogeologic Characterization, Morris Lake, New Jersey, Newton, All tags... Newton Reservoir, Township of Sparta, Water Budget, Water Use and Availability Science, bathymetry, bathymetry measurement, elevation, geoscientificInformation, imageryBaseMapsEarthCover, inlandWaters, location, multibeam, single beam sonar, structure, water depth, Fewer tags Depth raster, Morris Lake (Newton Reservoir), New Jersey, 2018 This dataset contains a bathymetric map of Morris Lake in the form of a raster grid of depth in feet below spillway elevation. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Geospatial Applications, Hydrogeologic Characterization, Morris Lake, New Jersey, Newton, All tags... Newton Reservoir, Township of Sparta, Water Budget, Water Use and Availability Science, bathymetry, bathymetry measurement, elevation, geoscientificInformation, imageryBaseMapsEarthCover, inlandWaters, location, multibeam, single beam sonar, structure, water depth, Fewer tags Nearshore bathymetry of the Columbia River littoral cell, Washington and Oregon, 2022 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 2022 (USGS Field Activity Number 2022-641-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 Nearshore bathymetry of the Columbia River littoral cell, Washington and Oregon, 2017 This portion of the USGS data release presents bathymetry data collected during surveys performed in the Columbia River littoral cell, Washington and Oregon in 2017 (USGS Field Activity Number 2017-666-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 an Odom Echotrac CV-100 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 using sound velocity profiles measured using a YSI CastAway CTD during... 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, single-beam echo sounder, Fewer tags Geospatial Dataset of Topographic and Bathymetric Survey Points collected for US Army Corps of Engineers as part of the Sustainable Rivers Program in the Allegheny River, PA downstream of the Kinzua Dam. This dataset contains spatial datasets of topographic and bathymetric survey data in addition to data table the shapefile data collected at the 3 focal areas of research included in the Sustainable Rivers Program (SRP) in the Allegheny River that were collected and processed in collaboration with US Army Corps of Engineers (USACE). The dataset is a combination of terrestrial topographic and bathymetry data measured by Trimble R10 Model 2 GNSS survey equipment or a FlowTracker2 Acoustic Doppler Velocimeter (ADV). The FlowTracker2 was used for flow measurements and water depth and spatial location of each flow measurement point were used to calculate river bottom bathymetry at those locations. Additionally, National... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Allegheny River, Allegheny River, Ecology, Forest County, GPS measurement, All tags... Hydrology, Pennsylvania, USGS Science Data Catalog (SDC), Warren County, Water Resources, bathymetry measurement, biota, freshwater ecosystems, river systems, stream discharge, Fewer tags BathymetryA Hillshade [USGS]--Offshore Aptos, California This part of DS 781 presents data for the shaded-relief map of Offshore of Aptos map area, California. Shaded-relief data are provided as two separate grids depending on mapping agency and processing method. This metadata file refers to the data included in "BathymetryAHS_USGS_OffshoreAptos.zip," which is accessible from https://doi.org/10.5066/F7K35RQB. These data accompany the pamphlet and map sheets of Cochrane, G.R., Johnson, S.Y., Dartnell, P., Greene, H.G., Erdey, M.D, Dieter, B.E., Golden, N.E., Hartwell, S.R., Ritchie, A.C., Kvitek, r.G., Maier, K.L., Endris, C.A., Davenport, C.W., Watt, J.T., Sliter, R.W., Finlayson, D.P., and Krigsman, L.M., (G.R. Cochrane and S.A. Cochran, eds.), 2016, California State... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Aptos, CMHRP, Coastal and Marine Hazards and Resources Program, Continental/Island Shelf, Marine Nearshore Subtidal, All tags... Marine Offshore Subtidal, Northern California Ecoregion, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Rock Substrate, Santa Cruz County, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, Unconsolidated Mineral Substrate, bathymetry, bathymetry and elevation, bathymetry measurement, distributions, environment, geoscientificInformation, imageryBaseMapsEarthCover, marine geophysics, marine geophysics, oceans, seabed, sidescan sonar, sonar methods, Fewer tags BathymetryA [2m]--Monterey Canyon and Vicinity Map Area, California This part of DS 781 presents data for 2-m and 5-m bathymetry and shaded-relief maps of Monterey Canyon and Vicinity, California. Bathymetry data are provided as separate grids depending on the mapping resolution. Data collected at shallower depths by the U.S. Geological Survey (USGS) and California State University, Monterey Bay (CSUMB) have a spatial resolution of 2 m per pixel, whereas data collected at deeper depths by the Monterey Bay Aquarium Research Institute (MBARI) have a spatial resolution of 5-m per pixel. This metadata file describes the 2-m data collected by the USGS and CSUMB, and processed by the USGS. The raster data file is included in "BathymetryA_2m_MontereyCanyon.zip," which is accessible from... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: CMGP, Coastal and Marine Geology Program, Continental/Island Shelf, Marine Nearshore Subtidal, Marine Offshore Subtidal, All tags... Monterey County, Moss Landing, Northern California Ecoregion, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Rock Substrate, Seafloor Topography, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, Unconsolidated Mineral Substrate, bathymetry, bathymetry measurement, distributions, environment, geoscientificInformation, geospatial datasets, image mosaics, imageryBaseMapsEarthCover, interferometric sonar, maps and atlases, marine geophysics, multibeam sonar, oceans, physical habitats and geomorphology, sea-floor characteristics, seabed, Fewer tags Mores Creek Arm Bathymetric Survey - Elevation DEM, Lucky Peak Lake, Boise County, Idaho, May 11 - 13, 2021 In 2004, about 90 migrating elk drowned after attempting to cross thin ice on the Mores Creek arm of Lucky Peak Lake upstream of the Highway 21 bridge. To better understand the depths over a range of reservoir pool elevations in the Mores Creek Arm, the U.S. Geological Survey, in cooperation with the Lucky Peak Power Plant Project, conducted high-resolution multibeam echosounder (MBES) bathymetric surveys on the Mores Creek arm on Lucky Peak Lake. The MBES data will assist reservoir managers and wildlife biologists with regulating reservoir water surface elevations (WSE) to support successful big game migration across Mores Creek on Lucky Peak Lake. Data collection provided nearly 100 percent coverage of bed elevations... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Raster; Tags: Boise, GPS measurement, Hypack, Hysweep, ID, All tags... Idaho, Idaho, Lucky Peak Lake, Lucky Peak Lake, Mores Creek, Mores Creek, Multibeam sonar, Pacific Northwest, USA, United States, bathymetry, bathymetry measurement, contouring, dam sites, digital elevation models, elevation, erosion, gaging stations, geospatial analysis, geospatial datasets, inlandWaters, land surveying, location, reference locations, reservoirs, sedimentation, spatial analysis, territorial waters, topographic maps, topography, Fewer tags Sidescan Image Mosaics of select Rock Outcrops of the St. Croix River, May 2021 This dataset is a digital image mosaic of sidescan for six sites where known rock structures exist in the St. Croix River. Sidescan sonar emits conical or fan-shaped beam down across a wide angle perpendicular to the path of the sensor through the water. The intensity of the acoustic reflections from the riverbed is recorded in a series of cross-track slices and when stitched together in a mosaic, form an image of the riverbed giving the user a view of the material and texture of the riverbed. Sidescan mosaics are being used in this project mainly as ancillary information to help view the rock structures and will also be used for investigating the use of hydroacoustic technologies for quantifying habitat for imperiled... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Minnesota, Rock Outcrop, Rock Substrate, St. Croix River, USGS-EMA-LOW-SB SMC: Freshwater mussels, All tags... Wisconsin, acoustic doppler current profiling, bathymetry measurement, benthic ecosystems, endangered species, image mosaics, rivers, sea-floor acoustic reflectivity, sidescan sonar, Fewer tags Eelgrass distributions and bathymetry derived from an acoustic survey of the Nisqually River delta, Washington, 2017 This portion of the USGS data release presents eelgrass distribution and bathymetry data derived from acoustic surveys of the Nisqually River delta, Washington in 2017 (USGS Field Activity Number 2017-614-FA). Eelgrass and bathymetry data were collected from the R/V George Davidson equipped with a single-beam sonar system and global navigation satellite system (GNSS) receiver. The sonar system consisted of a Biosonics DT-X single-beam echosounder and 420 kHz transducer with a 6-degree beam angle. Depths from the echosounder were computed using sound velocity data measured using a YSI CastAway CTD during the survey. Positioning of the survey vessel was determined at 5 to 10 Hz using a Trimble R7 GNSS receiver and... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, Billy Frank Jr Nisqually National Wildlife Refuge, CMHRP, Coastal and Marine Hazards and Resources Program, Echo Sounders, All tags... GPS (Global Positioning System), GPS measurement, Global Positioning System (GPS) observations, Nisqually River, PCMSC, Pacific Coastal and Marine Science Center, Pierce County, Puget Sound, Salish Sea, Thurston County, U.S. Geological Survey, USGS, USGS Coastal Habitats in Puget Sound Project (CHIPS), Water Depth, aquatic vegetation, bathymetry, bathymetry measurement, elevation, marine geophysics, sea-floor characteristics, single-beam echo sounder, Fewer tags Nearshore bathymetry data from the Elwha River delta, Washington, September 2013 This portion of the USGS data release presents bathymetry data collected during surveys performed on the Elwha River delta, Washington in September 2013 (USGS Field Activity Number W-07-13-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 using sound velocity profiles measured using a YSI CastAway CTD during the survey.... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, Clallam County, Echo Sounders, Elwha River, GPS (Global Positioning System), All tags... GPS measurement, Global Positioning System (GPS) observations, Olympic Peninsula, Strait of Juan de Fuca, Water Depth, bathymetry, bathymetry measurement, elevation, single-beam echo sounder, Fewer tags « 1 2 3 4 5 6 »