A topographic map introduces you to the peaks and valleys ... On that subject, in areas where there are peaks, hills, and mountains, contour lines can form large concentric circles that grow ...

That's why topographical or terrain maps were ... hills or mountains. Note the light brown numbers along the lines. In the example image, 400' is the elevation along that contour line.

The system is being used as an aid to VIU students, but it has also proven to be a handy interactive outreach tool at science ...