The bulk density of a planet will reflect the relative amounts of the materials the world is made of, regardless of what materials occur at the surface.
For a map of the mountainous area, the elevation has to be 5-100 meters. As the area is a mountain or a hilly upland area, it has a contour interval of 100 meters or more. For a relatively flat area it as to have a C.I of 10 meters or less.
