Читать книгу Geography For Dummies - Jerry T. Mitchell - Страница 104

All points on Earth have an elevation with respect to sea level. Altogether, they constitute “the lay of the land.” (Keep in mind that elevation also pertains to points on the ocean’s bottom.) Topography is the art and science of depicting heights and depths on a map. Like scale, topographic information is a basic feature of many maps and is commonly represented in three ways as indicated in Figure 5-3. The following sections discuss the three ways of showing topographic information.

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FIGURE 5-3: The terrain of a make-believe place, as depicted three ways.