Answer
Apr 15, 2026 - 02:32 PM
The five rules of contour lines are: (1) Contour lines never cross each other; (2) they form closed loops, either on or off the map; (3) closely spaced lines indicate steep slopes, while widely spaced lines indicate gentle slopes; (4) contour lines always point upstream when crossing a river or stream; and (5) the elevation between adjacent contour lines is always the same, called the contour interval. These rules help in interpreting the shape and elevation of the land on a topographic map.
