Topographic Map

topographic Map A role is a government agency 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 aggregate points of equal elevation on the surface of the land above or below a part surface, much(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 dark lines, body politics, and new(prenominal) symbols is the first step in using topographic maps. o Features ar shown as points, lines, or beas, depending on their sizing and extent. For example, individual houses may be shown as small dingy squares. o For larger buildings, the actual shapes are mapped. In dumbly built-up areas, most individual buildings are om itted 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 noticed on a topographic map are the area features, such as vegetation (green), water (blue), and densely built-up areas (gray or red).

o numerous features are shown by lines that may be straight, curved, solid, dashed, dotted, or in any combination. The colors of the lines usually indicate convertible classes of information: topographic contours ( brownness); lakes, streams, irrigation ditches, and other hydrographical f eatures (blue); land grids and of the essen! ce(p) roads (red); and other roads and trails, railroads, boundaries, and other cultural features (black). At one time, purple was used as a rescript color to show all feature changes. Currently, purple is not used in our revision program, unless purple features are passive 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, found it on our website: OrderCustomPaper.com

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