Isolines or contour lines are used to create Isoline Maps. Isoline maps are also topographic maps that join points of equal value that are being measured. Isolines allow the cartographer to convey three dimensional data onto a two dimensional surface. On isoline maps when the area between the isolines is very narrow that indicates a large increase in the third dimensional variable over an extremely short distance. This is the opposite when there is a wide gap between the isolines. The isoline map shown above features the Bright Angel Trail in the Grand Canyon National Park. As you can see from the map there are different rates of descent in elevation during the course of the 9.5 mile hike. In areas of greater change within a short distance the isolines are closer together while in areas where the hike is more of a leisurely walk the elevation does not change as rapidly and the isolines are further apart.
Tuesday, April 15, 2014
Isoline Map
Isolines or contour lines are used to create Isoline Maps. Isoline maps are also topographic maps that join points of equal value that are being measured. Isolines allow the cartographer to convey three dimensional data onto a two dimensional surface. On isoline maps when the area between the isolines is very narrow that indicates a large increase in the third dimensional variable over an extremely short distance. This is the opposite when there is a wide gap between the isolines. The isoline map shown above features the Bright Angel Trail in the Grand Canyon National Park. As you can see from the map there are different rates of descent in elevation during the course of the 9.5 mile hike. In areas of greater change within a short distance the isolines are closer together while in areas where the hike is more of a leisurely walk the elevation does not change as rapidly and the isolines are further apart.
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