Filters: Tags: topographic mapping (X) > partyWithName: U.S. Geological Survey, Pacific Coastal and Marine Science Center (X)

Filters Date Range Past year (2) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts PCMSC Science Data Coordinator U.S. Geological Survey - ScienceBase U.S. Geological Survey Amy Foxgrover Theresa Fregoso More... Categories Data (1) Tag Types Theme (3) Place (3) Tag Schemes USGS Thesaurus (3) None (2) Geographic Names Information System (GNIS) (2) Marine Realms Information Bank (MRIB) keywords (2) Geographic Names Information Systems (1) Data Categories for Marine Planning (3) ISO 19115 Topic Category (2) More... View Results as: JSON ATOM CSV

Digital elevation models (DEMs) of the Elwha River delta, Washington, July 2018 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 Digital elevation model (DEM) of south San Francisco Bay, California, created using bathymetry data collected between 2005 and 2020 (NAVD88) A 1-m resolution, continuous surface, bathymetric digital elevation model (DEM) of the southern portion of San Francisco Bay, was constructed from bathymetric surveys collected from 2005 to 2020. In 2014 and 2015 the California Ocean Protection Council (OPC) contracted the collection of bathymetric surveys of large portions of San Francisco Bay. A total of 93 surveys were collected using a combination of multibeam and interferometric side-scan sonar systems. Of those 93 surveys, 75 consist of swaths of data ranging from 18- to just over 100-meters wide. These swaths were separated by data gaps ranging from 10- to just over 300-meters wide. The no-data areas required interpolation to create a continuous surface.... Tags: Alviso Slough, Bathymetry and Elevation, Coyote Creek, Digital Elevation Model (DEM) 1 meter, Dumbarton Bridge, All tags... GPS measurement, Global Positioning System (GPS) observations, San Francisco Bay, San Mateo Bridge, bathymetry, digital elevation models, elevation, geographic information systems, geographic information systems (GIS), geospatial datasets, inlandWaters, multibeam echo sounder, multibeam sonar, single-beam echo sounder, single-beam echo sounder, topographic mapping, topography, Fewer tags River-channel topography on the Elwha River, Washington, 2006 to 2017 This portion of the data release presents topographic data collected at 5 study sites along Elwha River, Washington between 2006 and 2017. Elevations along channel-perpendicular transects were surveyed using a total station and prism rod. Initial geodetic control was established using static global positioning system (GPS) occupations. A total station was subsequently used to expand and maintain the survey control network at each site. All survey data were referenced to the NAD83 datum, using the UTM, zone 10, coordinate reference system. All elevations were referenced to the NAVD88 vertical datum. Based on repeat measurements of points with known positions, we estimated the horizontal and vertical accuracy of the... Categories: Data; Tags: Bathymetry and Elevation, CMGP, Coastal and Marine Geology Program, Elwha Dam (historical), Elwha River, All tags... Glines Canyon Dam (historical), PCMSC, Pacific Coastal and Marine Science Center, State of Washington, U.S. Geological Survey, USGS, field inventory and monitoring, gravel deposits, inlandWaters, river reaches, river systems, topographic mapping, topography, Fewer tags