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Echosounder Quality Assurance Points, Pepacton Reservoir, 2015 From 2013 to 2015, bathymetric surveys of New York City’s six West of Hudson reservoirs (Ashokan, Cannonsville, Neversink, Pepacton, Rondout, and Schoharie) were performed to provide updated capacity tables and bathymetric maps. Depths were surveyed with a single-beam echo sounder and real-time kinematic global positioning system (RTK-GPS) along planned transects at predetermined intervals for each reservoir. A separate set of echo sounder data was collected along transects at oblique angles to the main transects for accuracy assessment. Field survey data was combined with water-surface elevations in a geographic information system to create three-dimensional surfaces representing reservoir-bed elevations in the... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Delaware County, GPS measurement, Pepacton Reservoir, bathymetry, single-beam echo sounder Magnetotelluric sounding locations, stations 1 to 22, Southern San Luis Valley, Colorado, 2006 This dataset includes the locations of magnetotelluric (MT) stations collected in 2006 in the Southern San Luis Valley, Colorado. The U.S. Geological Survey conducted a series of multidisciplinary studies, including MT surveys, in the San Luis Valley to improve understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits comprising the principal groundwater aquifers of the Rio Grande rift. The shallow unconfined and the deeper confined Santa Fe Group aquifers in the San Luis Basin are the main sources of municipal water for the region. The population of the San Luis Valley region is growing rapidly and water shortfalls could have serious consequences. Future growth and land... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Colorado, Costilla County, Electromagnetic surveying, GIS, GPS measurement, All tags... Geophysics, MT, Magnetic field (earth), Magnetic surveying, Rocky Mountains, San Luis Valley, USGS Science Data Catalog (SDC), apparent resistivity, geographic information systems, geoscientificinformation, geospatial dataset, impedance, impedance phase, impedance strike, magnetotelluric, sounding, tipper, Fewer tags Ground-based transient electromagnetic data and resistivity models at selected sites of the California Central Coast and San Joaquin Valley 2019 Ground-based transient electromagnetic (TEM) data were acquired by the U.S. Geological Survey (USGS) at 16 locations of California’s southwestern San Joaquin Valley and Central Coast regions to define the electrical resistivity structure of hydrogeologic materials. Data were acquired using the ABEM WalkTEM system (Guideline Geo Ab, Sundbyberg, Sweden). TEM data were processed and numerically inverted to derive one-dimensional resistivity structure using SPIA (Aarhus Geosoftware, Aarhus, Denmark). The resulting models reveal vertical variations in electrical resistivity associated with geologic structure and zones of high salinity groundwater. This release includes raw and processed TEM data and a resistivity model... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CAWSC, COGG, California, California Oil Gas and Groundwater, California Water Science Center, All tags... Cat Canyon Oil Field, Central Coast, Electromagnetic sounding, Elk Hills Oil Field, GGGSC, GPS measurement, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Kern County, Lost Hills Oil Field, Monterey County, San Ardo Oil Field, San Joaquin Valley, Santa Barbara County, TDEM, TEM, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Water Quality, Water Resources, electromagnetic surveying, geophysics, geoscientificInformation, geospatial datasets, groundwater, hydrogeology, resistivity, time-domain electromagnetic method, transient electromagnetic method, Fewer tags Topography data from the Elwha River delta, Washington, August 2012 This portion of the USGS data release presents topography data collected during surveys performed on the Elwha River delta, Washington, in August 2012 (USGS Field Activity Number W-05-12-PS). Topography data were collected on foot with global navigation satellite system (GNSS) equipment mounted on backpacks operating primarily in Real-Time Kinematic (RTK) mode. A total of 4 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... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, Clallam County, Elwha River, GPS (Global Positioning System), GPS measurement, All tags... Global Positioning System (GPS) observations, Olympic Peninsula, Strait of Juan de Fuca, elevation, topography, Fewer tags Topography data from northern Monterey Bay, California, October 2014 This portion of the USGS data release presents topography data collected during surveys performed along northern Monterey Bay, California, in October 2014 (USGS Field Activity Number 2014-676-FA). Topographic profiles were collected on foot with GNSS receivers mounted on backpacks. Prior to data collection, vertical distances between the GNSS antennas and the ground were measured using a tape measure. Hand-held data collectors were used to log raw data and display navigational information allowing surveyors to navigate survey lines spaced at 50- to 250-m intervals along the beach. Profiles were surveyed from the landward edge of the study area (either the base of a bluff, engineering structure, or just landward... 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, GPS (Global Positioning System), GPS measurement, All tags... 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, elevation, topography, Fewer tags Nearshore bathymetry data from northern Monterey Bay, California, September 2017 This portion of the USGS data release presents bathymetry data collected during surveys performed in northern Monterey Bay, California in September 2017 (USGS Field Activity Number 2017-678-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: 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 Topography data from the Elwha River delta, Washington, September 2014 This portion of the USGS data release presents topography data collected during surveys performed on the Elwha River delta, Washington, in September 2014 (USGS Field Activity Number 2014-649-FA). Topography data were collected on foot with global navigation satellite system (GNSS) equipment mounted on backpacks operating primarily in Real-Time Kinematic (RTK) mode. A total of 5 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... Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, Clallam County, Elwha River, GPS (Global Positioning System), GPS measurement, All tags... Global Positioning System (GPS) observations, Olympic Peninsula, Strait of Juan de Fuca, elevation, topography, Fewer tags Elevation Raster, East Basin of Ashokan Reservoir, 2013 to 2014 From 2013 to 2015, bathymetric surveys of New York City’s six West of Hudson reservoirs (Ashokan, Cannonsville, Neversink, Pepacton, Rondout, and Schoharie) were performed to provide updated capacity tables and bathymetric maps. Depths were surveyed with a single-beam echo sounder and real-time kinematic global positioning system (RTK-GPS) along planned transects at predetermined intervals for each reservoir. A separate set of echo sounder data was collected along transects at oblique angles to the main transects for accuracy assessment. Field survey data was combined with water-surface elevations in a geographic information system to create three-dimensional surfaces representing reservoir-bed elevations in the... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Ashokan Reservoir, GPS measurement, Ulster County, bathymetry, single-beam echo sounder Elevation Contours, Pepacton Reservoir, 2015 From 2013 to 2015, bathymetric surveys of New York City’s six West of Hudson reservoirs (Ashokan, Cannonsville, Neversink, Pepacton, Rondout, and Schoharie) were performed to provide updated capacity tables and bathymetric maps. Depths were surveyed with a single-beam echo sounder and real-time kinematic global positioning system (RTK-GPS) along planned transects at predetermined intervals for each reservoir. A separate set of echo sounder data was collected along transects at oblique angles to the main transects for accuracy assessment. Field survey data was combined with water-surface elevations in a geographic information system to create three-dimensional surfaces representing reservoir-bed elevations in the... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Delaware County, GPS measurement, Pepacton Reservoir, bathymetry, single-beam echo sounder SACN Osceola Boat Landing: 2019 Substrate Data The U.S. Geological Survey (USGS) collected hydroacoustic data of the St. Croix River adjacent to the Osceola (WI) boat ramp for hydrographic and benthic mapping prior to the reconstruction project implemented by the National Park Service (NPS). This dataset contains predicted geologic substrate information that was interpreted from combined sonar datasets. The shapefile contains a general description of interpreted surficial bottom type with its associated class code in the attribute table. Benthic substrate maps provide important physical characteristics that can be used in habitat modeling to guide management planning of restoration and conservation efforts. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: GPS measurement, Minnesota, St. Croix, Wisconsin, benthic ecosystems, All tags... biota, field sampling, habitats, image mosaics, mollusks, multibeam sonar, sea-floor acoustic reflectivity, sidescan sonar, topographic maps, Fewer tags Lake Koocanusa Digital Elevation Model (DEM), Lincoln County, Montana In 2016, the U.S. Army Corps of Engineers (USACE) started collecting high-resolution multibeam echosounder (MBES) data on Lake Koocanusa. The survey originated near the International Boundary (River Mile (RM) 271.0) and extended down the reservoir, hereinafter referred to as downstream, about 1.4 miles downstream of the Montana 37 Highway Bridge near Boulder Creek (about RM 253). USACE continued the survey in 2017, completing a reach that extended from about RM 253 downstream to near Tweed Creek (RM 244.5). In 2018, the U.S. Geological Survey (USGS) Idaho Water Science Center completed the remaining portion of the reservoir from RM 244.5 downstream to Libby Dam (RM 219.9). The MBES data collected in 2016 and 2017... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Raster; Tags: GPS measurement, Hypack, Hysweep, Kootenai, Kootenai-Pend Oreille-Spokane, All tags... Lincoln, Montana, Multibeam sonar, Pacific Northwest, United States, Upper Kootenai, bathymetry, bathymetry measurement, contouring, dam sites, digital elevation models, elevation, erosion, gaging stations, geospatial analysis, geospatial datasets, inlandWaters, land surveying, lidar, location, reference locations, reservoirs, sedimentation, spatial analysis, territorial waters, topographic maps, topography, Fewer tags Topography data from northern Monterey Bay, California, March 2016 This portion of the USGS data release presents topography data collected during surveys performed along northern Monterey Bay, California, in March 2016 (USGS Field Activity Number 2016-627-FA). Topographic profiles were collected on foot with GNSS receivers mounted on backpacks. Prior to data collection, vertical distances between the GNSS antennas and the ground were measured using a tape measure. Hand-held data collectors were used to log raw data and display navigational information allowing surveyors to navigate survey lines spaced at 50- to 250-m intervals along the beach. Profiles were surveyed from the landward edge of the study area (either the base of a bluff, engineering structure, or just landward of... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, CMGP, Coastal and Marine Geology Program, GPS (Global Positioning System), GPS measurement, All tags... 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, elevation, topography, Fewer tags Nearshore bathymetry data from the Elwha River delta, Washington, May 2011 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... 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 Eelgrass distributions derived from a towed underwater video survey of the Nisqually River delta, 2017 This portion of the USGS data release presents eelgrass distributions derived from towed underwater video surveys of the Nisqually River delta, Washington in 2017 (USGS Field Activity Number 2017-614-FA). Eelgrass data were collected from the R/V George Davidson equipped with a towed underwater video system and global navigation satellite system (GNSS) receiver. The underwater video system consisted of a Splashcam standard definition video camera connected to a Sony GV-D1000 video monitor and tape recorder. Positioning of the survey vessel was determined at 1 Hz intervals using a Trimble R7 GNSS receiver and Trimble Zephyr Model 2 antenna. The positioning data from the GNSS were encoded onto the audio track of the... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Billy Frank Jr Nisqually National Wildlife Refuge, CMHRP, Coastal and Marine Hazards and Resources Program, Flora, GPS measurement, All tags... 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), aquatic vegetation, biota, sea-floor characteristics, underwater photography, video observation, Fewer tags Topography data from the Elwha River delta, Washington, August 2011 This portion of the USGS data release presents topography data collected during surveys performed on the Elwha River delta, Washington, in August 2011 (USGS Field Activity Number W-06-11-PS). Topography data were collected on foot with global navigation satellite system (GNSS) equipment mounted on backpacks operating primarily in Real-Time Kinematic (RTK) mode. A total of 4 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... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, Clallam County, Elwha River, GPS (Global Positioning System), GPS measurement, All tags... Global Positioning System (GPS) observations, Olympic Peninsula, Strait of Juan de Fuca, elevation, topography, Fewer tags 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 Mores Creek Arm Bathymetric Survey, 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... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Boise, GPS measurement, Geomorphology, Hydrology, Hypack, All tags... Hysweep, ID, Idaho, Idaho, Lucky Peak Lake, Lucky Peak Lake, Mores Creek, Mores Creek, Multibeam sonar, Pacific Northwest, Remote Sensing, USA, USGS Science Data Catalog (SDC), United States, Water Resources, Wildlife Biology, 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 Topography data from the Elwha River delta, Washington, July 2018 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 Elevation Contours, East Basin of Ashokan Reservoir, 2013 to 2014 From 2013 to 2015, bathymetric surveys of New York City’s six West of Hudson reservoirs (Ashokan, Cannonsville, Neversink, Pepacton, Rondout, and Schoharie) were performed to provide updated capacity tables and bathymetric maps. Depths were surveyed with a single-beam echo sounder and real-time kinematic global positioning system (RTK-GPS) along planned transects at predetermined intervals for each reservoir. A separate set of echo sounder data was collected along transects at oblique angles to the main transects for accuracy assessment. Field survey data was combined with water-surface elevations in a geographic information system to create three-dimensional surfaces representing reservoir-bed elevations in the... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Ashokan Reservoir, GPS measurement, Ulster County, bathymetry, single-beam echo sounder Elevation Contours, Schoharie Reservoir, 2014 From 2013 to 2015, bathymetric surveys of New York City’s six West of Hudson reservoirs (Ashokan, Cannonsville, Neversink, Pepacton, Rondout, and Schoharie) were performed to provide updated capacity tables and bathymetric maps. Depths were surveyed with a single-beam echo sounder and real-time kinematic global positioning system (RTK-GPS) along planned transects at predetermined intervals for each reservoir. A separate set of echo sounder data was collected along transects at oblique angles to the main transects for accuracy assessment. Field survey data was combined with water-surface elevations in a geographic information system to create three-dimensional surfaces representing reservoir-bed elevations in the... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Delaware County, GPS measurement, Greene County, Schoharie County, Schoharie Reservoir, All tags... bathymetry, single-beam echo sounder, Fewer tags « 1 ... 3 4 5 6 7 8 »