A contour line is a line of 'equal height': every point on a contour is the same height above sea level.
The closer any two contour lines are the steeper the hill is: and the further apart they are the move level the ground.
If a group of contour lines suddenly move to form a V shape then the hill either has a promontory sticking out from it or a valley in it.
Political distribution maps provide information about registered voters living in a given area, and the political party to which they are registered. Politicians use these maps when mapping out - or remapping - Congressional districts represented in the House of Representatives.
