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Newberry Volcano, one of the largest Quaternary volcanoes in the conterminous United States, is a broad shield-shaped volcano measuring 60 km north-south by 30 km east-west with a maximum elevation of more than 2 km above sea level. It is the product of deposits from thousands of eruptions, including at least 25 in (approximately) the last 12,000 years (the Holocene Epoch). Newberry Volcano has erupted as recently as 1,300 years ago, but isotopic ages indicate that the volcano began its growth as early as 0.6 million years ago. Such a long eruptive history together with recent activity suggests that Newberry Volcano is likely to erupt in the future. This DEM (digital elevation model) of Newberry Volcano contributes...
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Surveys of the bathymetry and backscatter intensity of the sea floor south of Long Island, New York, were carried out in November 1998 using a Simrad EM1000 multibeam echosounder mounted on the Canadian Coast Guard ship Frederick G. Creed. The purpose of the multibeam echosounder surveys was to explore the bathymetry and backscatter intensity of the sea floor in several areas off the southern coast of Long Island along the 20-meter isobath. Survey areas offshore of Fire Island Inlet, Moriches Inlet, Shinnecock Inlet, and southwest of Montauk Point were about 1 kilometer (km) wide and 10 km long. The area was mapped by the U.S. Geological Survey with support from the Canadian Hydrographic Service and the University...
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This dataset represents a shaded relief, or hillshade, for the Northern U.S. and Canada. This shaded relief raster was created from a 30 meter Digital Elevation Model (DEM) using the ArcMap geoprocessing tool "hillshade". The DEM consists of two mosaiced datasets: 1. U.S. Geological Survey's (USGS) 30 meter National Elevation Dataset (NED) , ~1 arc-second data that is updated over large areas by integrating the 10 meter or better source data(where available), re-sampled to 1 arc-second. 2. The Canadian Digital Elevation Data, Level 1 (CDED1) The Center of Topographic Information (CTI) jointly produces the CDED with federal, provincial, and territorial government agencies as well as the private sector. The CDED...
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Explanation: Advances in various technologies have enabled increased accuracies, higher resolutions, and reduced costs for elevation data acquired using airborne IFSAR (Interferometric Synthetic Aperture RADAR) and LIDAR (Light Detection and Ranging) technologies. Associated IFSAR magnitude (RADAR DOQ) data also offers improved resolution, dynamic range, and reduced noise over earlier systems. The USGS acquired IFSAR coverage for the Colorado Front Range area in 1999, and is evaluating both IFSAR and LIDAR for its Data Revision program. In this poster the IFSAR DEM (phase difference of return pulses) for the entire study area has been displayed in graytone shaded relief. Procedures used: After paneling all...
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The 90m DEM for Wyoming contains elevation in meters for each 90m cell making up the raster data. In order to conserve space, the DEM was converted from floating point data to integer values. This dataset was converted from US Geological Survey's 1-Degree digital elevation models for Wyoming consisting of a sampled array of elevations for ground positions; see the USGS National Mapping Program's Data User Guide for the DEMs for complete information about the DEM.
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The 90m DEM for Wyoming contains elevation in meters for each 90m cell making up the raster data. In order to conserve space, the DEM was converted from floating point data to integer values. This dataset was converted from US Geological Survey's 1-Degree digital elevation models for Wyoming consisting of a sampled array of elevations for ground positions; see the USGS National Mapping Program's Data User Guide for the DEMs for complete information about the DEM.
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The hillshade image was created from raster to grid datausing U.S. Geological Survey 30 meter resolution DigitalElevation Models, (DEM's).


    map background search result map search result map Digital Elevation Model for Wyoming 90 meter Digital Elevation Model for Wyoming 90 meter Hillshade of the San Gorgonio Pass area, Riverside County, California. Shaded Relief, Northeast U.S. and Canada (Draft poster)  Colorado Front Range:  IFSAR (Radar) Topography Bathymetry and Backscatter Intensity of the Sea Floor South of Long Island, New York High-resolution digital elevation dataset for Newberry Volcano and vicinity, Oregon, based on lidar survey of August-September, 2010 and bathymetric survey of June, 2001 High-resolution digital elevation dataset for Newberry Volcano and vicinity, Oregon, based on lidar survey of August-September, 2010 and bathymetric survey of June, 2001 Hillshade of the San Gorgonio Pass area, Riverside County, California. Bathymetry and Backscatter Intensity of the Sea Floor South of Long Island, New York (Draft poster)  Colorado Front Range:  IFSAR (Radar) Topography Digital Elevation Model for Wyoming 90 meter Digital Elevation Model for Wyoming 90 meter Shaded Relief, Northeast U.S. and Canada