Aerial View Maps

Can anyone tell me about depressions on topographic maps?

I need to draw a topo map for school of an island, 126 ft. tall, with at least 7 contour lines, and it needs a depression in it. Can you tell me how to draw it in using the 11 contour lines I already have drawn?

Public Comments

1. Take your smallest contour line and add a series of short slashes from it pointing towards the center. Or draw a closed countour anywhere between two contour lines and use the inward slashes to indicate the decrease in elevation.
2. Depressions are sinkholes. Hope this helps.
3. Depressions can be drawn on a topo map by either placing little inward-facing slashes on the topmost contour line, or you can draw a little depression (a circle) and put the inward slashes on. Draw your map in pencil first, I'd say. Hope your map turns out well!!