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A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes. [4] The contour interval of a contour map is the difference in elevation between successive contour lines. [5] The gradient of the function is always perpendicular to the contour ...
The various features shown on the map are represented by conventional signs or symbols. For example, colors can be used to indicate a classification of roads. These signs are usually explained in the margin of the map, or on a separately published characteristic sheet. [17] [18] [19] Topographic maps are also commonly called contour maps or ...
Siegfried map of Bernina Pass (1877) with black, blue and brown contour lines at 30-meter intervals. On maps produced by Swisstopo, the color of the contour lines is used to indicate the type of ground: black for bare rock and scree, blue for ice and underwater contours, and brown for earth-covered ground. [4]
A contour chart of scale factors of GS50 projection. Maps reflecting directions, such as a nautical chart or an aeronautical chart, are projected by conformal projections. Maps treating values whose gradients are important, such as a weather map with atmospheric pressure, are also projected by conformal projections.
The map scale depends on the purpose of the competition and also the standard used, for example, a map used in a foot orienteering long distance event has a scale of 1:15000. The map is printed in six base colours, [ 3 ] which cover the main groups: Land forms, rock and boulders, water and marsh , vegetation, and man-made features, and an extra ...
Each of these 1:50,000 sheets, in turn, was at one time split into eight 1:25,000 scale map sub-sheets, lettered as lower-case a to h, using the same boustrophedon pattern as the smaller-scale map areas and sheets. These 1:25,000 scale maps were produced from the 1960s to about 1975, then abandoned, and liquidated in the 1980s (along with the ...
These tints are shown as bands of color in a graduated scheme or as a color scheme applied to contour lines themselves; either method is considered a type of Isarithmic map. Hypsometric tinting of maps and globes is often accompanied by a similar method of bathymetric tinting to convey differences in water depth. Hypsometric tinted contour lines
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