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USGS topographic map of Stowe, Vermont with contour lines at 20-foot intervals. Terrain cartography or relief mapping is the depiction of the shape of the surface of the Earth on a map, using one or more of several techniques that have been developed.
On the other side, the purpose and needs of making maps for Wikipedia and our general public push us to be human friendly, and thus look for graphical lightness and elegance. Thus, out of the 4 operations below: one operation increases the visible details, while the three others make the information load smaller by reducing details so that the ...
Relief map of Spain's Sierra Nevada, showing use of both shading and false color as visualization tools to indicate elevation. The digital elevation model itself consists of a matrix of numbers, but the data from a DEM is often rendered in visual form to make it understandable to humans.
Shaded relief map of New Jersey Main article: Terrain cartography § Shaded relief Another useful product derived from the terrain surface is a shaded relief image, which approximates the degree of illumination of the surface from a light source coming from a given direction.
The data is filled using local survey maps and photographs. The OpenTopoMap website uses this fill. It has been partially updated for the 1-arcsecond release in the US. In November 2013, LP DAAC released [16] the NASA Shuttle Radar Topography Mission (SRTM) Version 3.0 (SRTM Plus) Product collection with all voids eliminated.
Topographic maps are also commonly called contour maps or topo maps. In the United States, where the primary national series is organized by a strict 7.5-minute grid, they are often called or quads or quadrangles. Topographic maps conventionally show topography, or land contours, by means of contour lines.
According to the Dictionary of the Scots Language, a modern compilation of Scots words past and present, hurkle-durkle means “to lie in bed or to lounge after it’s time to get up or go to work.”
Heightmap comes from the mathematical term 'map' and heightfield comes from the mathematical term 'vector field'. Heightmap is the more correct description because most heightfields are not a (vector) field in mathematical terms but they are always a map (in mathematical terms as well as in the visual representation).