![]() Here are some key ideas to consider when examining topographic maps: From these maps, you can determine the appearance of a landscape (hills, valleys, depressions, etc.). Contour lines on topographic maps show locations of equal elevation. Isolines can never end abruptly in the middle of a map, they must either run to the edge, or close on themselvesįield maps that show elevation data are called topographic maps, or contour maps.All isolines must be smooth and curving, separating larger values from smaller values.When drawing isolines, you must follow these guidelines: Different types of isolines have different names. To make field maps easier to read, we often draw in isolines, which are lines that connect points of equal value. The data could be anything from air pressure, to temperature, to pollution, to elevation. A field is a type of map that shows some sort of data.
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