Topographic (or contour) maps are the ones with all those weird squiggles and loops. Those strange lines are contour lines, which help show the shape of the land surface. The lines mark elevation — the distance, in feet, above sea level.
All points on a contour line have the same elevation — that is, they're all at the same height above sea level. Slice off the top of a mountain, and the perimeter is a contour line. Move down the mountain and slice off a bit more. That's another contour line.
Every fifth line on a topographic map is thicker and labeled with the elevation. This line is called the index contour; its purpose is to help in counting the elevation on a map.
Contour lines can also show the slope of the land. Here are additional pointers on reading topographical map
Contour lines are very important in teaching natural sciences because they represent relief in an accurate way. Relief is controlled by rock type and geological structures. These two factors influence in the location and shape of rivers, which in terms, help the development of soils and vegetation.
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Answer:
Topographic (or contour) maps are the ones with all those weird squiggles and loops. Those strange lines are contour lines, which help show the shape of the land surface. The lines mark elevation — the distance, in feet, above sea level.
All points on a contour line have the same elevation — that is, they're all at the same height above sea level. Slice off the top of a mountain, and the perimeter is a contour line. Move down the mountain and slice off a bit more. That's another contour line.
Every fifth line on a topographic map is thicker and labeled with the elevation. This line is called the index contour; its purpose is to help in counting the elevation on a map.
Contour lines can also show the slope of the land. Here are additional pointers on reading topographical map
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Contour lines are very important in teaching natural sciences because they represent relief in an accurate way. Relief is controlled by rock type and geological structures. These two factors influence in the location and shape of rivers, which in terms, help the development of soils and vegetation.
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