Map Measurer
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“The map measurer is an instrument specially designed for quickly measuring distances or lines on a map. It consists of a dial case, handle, and a small wheel or roller.” -U.S. Chief of Engineers
Galleries
Measurement ToolsSource
Chief of Engineers Advance Map and Aerial Photograph Reading (Washington, DC: United States Government Printing Office, 1941)
Downloads
2400×744, 201.6 KiB
1024×317, 37.1 KiB
640×198, 20.4 KiB
320×99, 7.9 KiB