Filters: Tags: Terrain Elevation (X) > Types: Downloadable (X)

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BLM REA NGB 2011 NED Elevation The National Elevation Dataset (NED) is the primary elevation data product produced and distributed by the USGS. The NED provides the best available public domain raster elevation data of the conterminous United States, Alaska, Hawaii, and territorial islands in a seamless format. The NED is derived from diverse source data, processed to a common coordinate system and unit of vertical measure. All NED data are distributed in geographic coordinates in units of decimal degrees, and in conformance with the North American Datum of 1983 (NAD 83). All elevation values are provided in units of meters, and are referenced to the North American Vertical Datum of 1988 (NAVD 88) over the conterminous United States. The vertical... Types: Downloadable; Tags: 1-DEGREE DEM, 2-ARC-SECOND DEM, 7.5-MINUTE DEM, BLM, Bureau of Land Management, All tags... CARTOGRAPHY, DEM, DIGITAL ELEVATION MODEL, DIGITAL MAPPING, DIGITAL TERRAIN MODEL, DOI, DRAINAGE AREA, EARTH SCIENCE, ELEVATION, EROS, GEODATA, GIS, GRID, Geology, Geospatial, HIGH RESOLUTION, HYDROLOGIC, HYDROLOGIC MODELING, HYDROLOGY, LAND SURFACE, LANDFORMS, LIDAR, LIGHT DETECTION AND RANGING, LiDAR, MAPPING, NATIONAL ELEVATION DATASET, NED, NGB 2011, Northern Great Basin, RASTER, REA, Rapid Ecoregional Assessment, TERRAIN ELEVATION, TOPOGRAPHY, U.S. GEOLOGICAL SURVEY, USGS, elevation, Fewer tags BLM REA MIR 2011 ned10m13 90m The U.S. Geological Survey has developed a National Elevation Dataset (NED). The NED is a seamless mosaic of best-available elevation data. The 7.5-minute elevation data for the conterminous United States are the primary initial source data. In addition to the availability of complete 7.5-minute data, efficient processing methods were developed to filter production artifacts in the existing data, convert to the NAD83 datum, edge-match, and fill slivers of missing data at quadrangle seams. One of the effects of the NED processing steps is a much-improved base of elevation data for calculating slope and hydrologic derivatives. The specifications for the NED 1 arc second and 1/3 arc second data are: Geographic coordinate... Types: Downloadable; Tags: 1-DEGREE DEM, 2-ARC-SECOND DEM, 7.5-MINUTE DEM, BLM, Bureau of Land Management, All tags... CARTOGRAPHY, DEM, DIGITAL ELEVATION MODEL, DIGITAL MAPPING, DOI, EARTH SCIENCE, EDC, EROS, GEODATA, GIS, Geology, Geospatial, LAND SURFACE, LANDFORMS, MAPPING, MIR 2011, Middle Rockies, RASTER, REA, Rapid Ecoregional Assessment, TERRAIN ELEVATION, TOPOGRAPHY, USGS, elevation, Fewer tags BLM REA NGB 2011 NED Elevation Percent Slope The National Elevation Dataset (NED) is the primary elevation data product produced and distributed by the USGS. The NED provides the best available public domain raster elevation data of the conterminous United States, Alaska, Hawaii, and territorial islands in a seamless format. The NED is derived from diverse source data, processed to a common coordinate system and unit of vertical measure. All NED data are distributed in geographic coordinates in units of decimal degrees, and in conformance with the North American Datum of 1983 (NAD 83). All elevation values are provided in units of meters, and are referenced to the North American Vertical Datum of 1988 (NAVD 88) over the conterminous United States. The vertical... Types: Downloadable; Tags: 1-DEGREE DEM, 2-ARC-SECOND DEM, 7.5-MINUTE DEM, BLM, Bureau of Land Management, All tags... CARTOGRAPHY, DEM, DIGITAL ELEVATION MODEL, DIGITAL MAPPING, DIGITAL TERRAIN MODEL, DOI, DRAINAGE AREA, EARTH SCIENCE, ELEVATION, EROS, GEODATA, GIS, GRID, Geology, Geospatial, HIGH RESOLUTION, HYDROLOGIC, HYDROLOGIC MODELING, HYDROLOGY, LAND SURFACE, LANDFORMS, LIDAR, LIGHT DETECTION AND RANGING, LiDAR, MAPPING, NATIONAL ELEVATION DATASET, NED, NGB 2011, Northern Great Basin, RASTER, REA, Rapid Ecoregional Assessment, TERRAIN ELEVATION, TOPOGRAPHY, U.S. GEOLOGICAL SURVEY, USGS, elevation, Fewer tags BLM REA MIR 2011 ned10m13 30m The U.S. Geological Survey has developed a National Elevation Dataset (NED). The NED is a seamless mosaic of best-available elevation data. The 7.5-minute elevation data for the conterminous United States are the primary initial source data. In addition to the availability of complete 7.5-minute data, efficient processing methods were developed to filter production artifacts in the existing data, convert to the NAD83 datum, edge-match, and fill slivers of missing data at quadrangle seams. One of the effects of the NED processing steps is a much-improved base of elevation data for calculating slope and hydrologic derivatives. The specifications for the NED 1 arc second and 1/3 arc second data are: Geographic coordinate... Types: Downloadable; Tags: 1-DEGREE DEM, 2-ARC-SECOND DEM, 7.5-MINUTE DEM, BLM, Bureau of Land Management, All tags... CARTOGRAPHY, DEM, DIGITAL ELEVATION MODEL, DIGITAL MAPPING, DOI, EARTH SCIENCE, EDC, EROS, GEODATA, GIS, Geology, Geospatial, LAND SURFACE, LANDFORMS, MAPPING, MIR 2011, Middle Rockies, RASTER, REA, Rapid Ecoregional Assessment, TERRAIN ELEVATION, TOPOGRAPHY, USGS, elevation, Fewer tags