topographic maps differ from a relief map?well if you would look closely on both maps ask this question to your self ....,how are the contour lines different? once you answer that you the answer to...
By isobases; lines that connect points that are on the same height above sea level. Usually isobases are accompanied by a number, giving the height above sea level in feet or metres.
The relief of an area on a map is the difference between the highest point and the lowest point. You find relief by finding the highest and lowest numbers on a contour map, then you subtract those...