I was on this site or another and it had a link for interactive topo maps, which showed contour lines in lakes, rivers, etc.... Now I can not find it. Does any know of a site that has the same information. If you can provide me with the link it would be greatly appreciated. I am mainly interested in Deep Creek Lake in Maryland.
Can anyone tell me what is the difference between a point and a secondary point? Also how would you recognize them on a map?
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