The following organizations participated by contributing funding or source data: the National Aeronautics and Space Administration (NASA), the United Nations Environment Programme/Global Resource Information Database (UNEP/GRID), the U.S. Click on a map to view its topography, its elevation and its terrain.
Topographic elevation map free#
Geological Survey´s EROS Data Center (EDC). Visualization and sharing of free topographic maps. Due to how precise the mapping of landforms is (e.g. View all of our high-quality shaded relief USGS topo maps, Forest Service maps, satellite images, and custom map layers for free. GTOPO30, completed in late 1996, was developed over a three year period through a collaborative effort led by staff at the U.S. Topographic maps are provided by the official surveying authorities. GTOPO30 was derived from several raster and vector sources of topographic information. GTOPO30 is a global digital elevation model (DEM) with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer). Geological Survey, EROS Data Center, Sioux Falls, South Dakota. Topographic maps may have many contour lines. The DTM was hillshaded using ArcMap and Spatial Analyst using following parametres: Azimuth: 315, Altitude: 45, Model shadows: Yes, Z factor: 10, Cell size: 1000 m. World topographic map Legal notice Contact In order to remain free and to keep improving, this site uses cookies created by Google to compile visit statistics and display personalized advertisements. These topographic elevations found mostly on online map can only be viewed in a macro scale level, showing a minimum of 20m contour intervals. Topographic maps are also known as topo maps or contour. Visualization and sharing of free topographic maps. The Caspian Sea border, the Africa depression and some areas from the Netherlands, all under sea level were corrected. Ill dive into the deeper subjects of navigation, map & compass, and overland routes in other guides. The DTM was converted to raster (georefernced tiff) using Arcview and Grid Pig extension. The data set was compiled by EEA and is derived from the GTOPO30 dataset ().
OMST 1-1 to EEA (SBJ) filed by CDR/data policy/USGS/elevation data). Geological Survey (Michael G Benson) dated ref. Geographic accuracy: 1000 m Rights: (Letter of the U.S.
0 kommentar(er)
