Monday, March 5, 2012

Topographic map


http://en.wikipedia.org/wiki/Topographic_map

As shown above, a Topographic map is a large scale map that contains horizontal and vertical dimensions of different land surfaces, otherwise known as relief. Topographic maps contain both man-made and natural features and are not one, but two map sheets overlapping to create the actual map. The topographic map also utilizes contour lines which have come up on our power points and are imaginary lines that join equal point values of what is being mapped. The difference from contour line to contour line is what distinguishes the elevation of certain areas on the map. Topographic maps are to show a certain areas elevation and other vertical features. These maps have been widely used by the military to plan specific attacks as well as where to defend certain areas. They would use a topographic map because knowing certain areas elevation can be crucial when fighting a major battle and can be the deciding factor between a victory and a loss.

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