topographic Map A role is a design of the Earth, or part of it. The shape of the Earths step up is shown by contour lines. Contours atomic number 18 imaginary lines that draw together points of equal elevation on the surface of the land to a higher place or below a part surface, much(prenominal)(prenominal) as mean sea level. It gives o streak the height of mountains, o depths of the ocean bottom, and o steepness of slopes. The map includes symbols that represent such gasconades as streets, buildings, streams, and ve chokeation. Reading Topographic Maps o Interpreting the washed-out lines, body politics, and new(prenominal) symbols is the first step in using topographic maps. o Features ar shown as points, lines, or atomic number 18as, depending on their size and extent. For example, individual houses may be shown as small lightlessness squares. o For larger buildings, the actual shapes are mapped. In thickly buil t-up areas, most individual buildings are omitted and an area tint is shown. On some maps, post offices, churches, city halls, and other landmark buildings are shown within the tinted area. o The first features ordinarily noniced on a topographic map are the area features, such as vegetation (green), water (blue), and densely built-up areas (gray or red).
o many features are shown by lines that may be straight, curved, solid, dashed, dotted, or in any combination. The colors of the lines usually indicate connatural classes of information: topographic contours ( chocolate-brown); lakes, streams, ir rigation ditches, and other hydrographical ! features (blue); land grids and key roads (red); and other roads and trails, railroads, boundaries, and other cultural features (black). At one time, purple was used as a change color to show all feature changes. Currently, purple is not used in our revision program, unless purple features are yet present on many existing maps. o Many features are identified by labels, such as Substation or Golf Course. o Topographic contours are shown in brown by lines of...If you want to get a full essay, methodicalness it on our website: OrderCustomPaper.com
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