I found a blast from my past! I did a google search after reading Zero's topo map thread and found 2 YouTube videos of the VERY SAME 1966 Army training film I used as part of the search and rescue classes I taught in the '70s and '80s.
For anyone interested, they're well worth watching.
Topographic Maps: "Grid Distance and Elevation" pt 1-2 1966 US Army
http://www.youtube.com/watch?v=mYLxZ_F7DEw
Topographic Maps: "Grid Distance and Elevation" pt 2-2 1966 US Army
http://www.youtube.com/watch?v=KKts3nApuZI
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