Contour maps show elevation. The contour interval tells what the difference is between each contour line is, so lines closer together means a steeper slope, and further apart means a gentler slope.
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you would need the intervals of each angle to make the map.
A topographical map will show contour lines and spot heights, with mountain tops marked with their height.
When contour lines are close together the land is steep
The Relationship between the relief of an area and the contour interval on a map of the area is A contour line
A map of the Rocky Mountains would have a small contour interval because of the multiple peaks and ridges and the constant increase of elevation.