Contour lines are lines connecting points of equal elevation. They are useful because they allow to better understand the shape of the land surface (the topography) on a map.
The Elevation Interval of a contour map is the difference in elevation between successive contour lines. Typical values of the Elevation Interval are 100, 50, 25, or 10 meters for areas with large elevation variations (e.g. mountains) and 5, 2, 1, or 0.5 meters for areas with small elevation variations (e.g. flat land).
Information: The contour lines generated using the DSM (Digital Surface Model) are useful when the area is not covered by objects, like buildings. If the area is covered by buildings, the contour lines generated using the DTM (Digital Terrain Model) are more useful. For more information about the contour lines using the DTM: Contour Lines using the DTM.
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| Contour Lines of a quarry | Contour Lines and DSM of a quarry |
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