To find changes in elevation on a map, you can use contour lines. Contour lines are lines that connect points of equal elevation on a map. Each contour line represents a specific elevation, and the closer the contour lines are to each other, the steeper the slope or change in elevation. To determine the change in elevation between two points on a map, you can counting the number of contour lines crossed, and multiply that number by the contour interval, which is the elevation difference between each contour line.
