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Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types ArcGIS REST Map Service (2) ArcGIS Service Definition (2) Downloadable (2) Map Service (2) Citation (1) More... Contacts Nicholas M Enwright Elizabeth A Nystrom U.S. Geological Survey - ScienceBase New York Water Science Center U.S. Geological Survey More... Tag Types Place (2) Theme (2) USGS Scientific Topic Keyword (2) Harvest Set (2) Tag Schemes Common geographic names (1) USGS Thesaurus (2) Coastal and Marine Ecological Classification Standard (1) ISO 19115 Topic Category (1) Geographic Names Information System (GNIS) (1) View Results as: JSON ATOM CSV

Geospatial Bathymetry Dataset and Elevation-Area-Capacity Table for 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: ArcGIS REST Map Service, ArcGIS Service Definition, Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ashokan Reservoir, GPS measurement, Geography, Geospatial Bathymetry, USGS Science Data Catalog (SDC), All tags... Ulster County, Water Resources, bathymetry, single-beam echo sounder, Fewer tags Contractor vertical accuracy checkpoints for 3D Elevation Program digital elevation models in the Northern Gulf of Mexico and Atlantic coastal regions, 2012–2020 Vertical accuracy of elevation data in coastal environments is critical because small variations in elevation can affect an area’s exposure to waves, tides, and storm-related flooding. Elevation data contractors typically quantify the vertical accuracy of digital elevation models (DEMs) developed using light detection and ranging data acquisition on a per-project basis to gauge whether the datasets meet quality and accuracy standards. To better understand the vertical accuracy of DEMs along the Gulf of Mexico and Atlantic coast, we collated over 5200 contractor points for this region that were collected for per-project-level analyses produced for assessing DEMs acquired for the U.S. Geological Survey’s 3D Elevation... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Alabama, Atlantic, Connecticut, Delaware, Ecology, All tags... Emergent Wetland, Estuarine Coastal, Florida, Forested Wetland, GPS measurement, Geography, Geomorphology, Georgia, Gulf of Mexico, Louisiana, Maine, Maryland, Massachusetts, Mississippi, New York, North Carolina, Texas, USGS Science Data Catalog (SDC), biota, coastal processes, digital elevation models, environment, farming, land use and land cover, lidar, marsh ecosystems, remote sensing, wetland ecosystems, Fewer tags