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#1
04-09-13, 15:07
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I have one somewhere for my plotting board... never used it yet and normally leave it behind... as already said... very well made!
Tim Quote:
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#2
05-09-13, 00:27
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No cartographers here?
Rob, it's an open sight alidade. It was used to make topographic maps on a plane table. The idea was you would use the sights to determine the direction of an object, a level to estimate its elevation and stadia measurements to determine its distance. The operator would plot features of interest onto a map. The RCA (your interest I presume) used these in 1st and 2nd Survey RCA.
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