What is a Topographic Map

Jun 28th, 2015
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A map is a way of representing on a two-dimensional surface, (a paper, a computer monitor, etc.) any real-world location or object. Many maps only deal with the two-dimensional location of an object without taking into account its elevation. Topographic maps on the other hand do deal with the third dimension by using contour lines to show elevation change

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What is a Topographic Map . . .What is a Map?A map is a way of representing on a two-dimensional surface, (a paper, a computer monitor, etc.) any real-world location or object. Many maps only deal with the two-dimensional location of an object without taking into account its elevation.Topographic maps on the other hand do deal with the third dimension by using contour lines to show elevation change on the surface of the earth, (or below the surface of the ocean). The concept of a topographic map is, on the surface, fairly simple. Contour lines placed on the map represent lines of equal elevation above (or below) a reference datum. To visualize what a contour line represents, picture a mountain (or any other topographic feature) and imagine slicing through it with a perfectly flat, horizontal piece of glass. The intersection of the mountain with the glass is a line of constant elevation on the surface of the mountain and could be put on a map as a contour line for the elevation of the slice above a reference datum.The title of the quadrangle is printed in the upper and lower right corners of the map. In addition to the title of the quadrangle itself, the titles of adjacent quadrangles are printed around the edges and at the corners of the map. This allows you to easily find a neighboring map if you are interested in an area not shown on your map. In addition there is information about the projection and grid(s) used, scale, contour intervals, magnetic and decl

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