Projection ruling machine of the U.S. Coast and Geodetic Survey. During the Second World War, the projection for literally thousands of maps was drawn by this machine which was much produced projections much quicker than human draftsmen.
Photo Category: Coast and Geodetic Survey - Instruments - Projection Ruling Machine
| 640 x 424 | 38.41 KB | |
| 1280 x 847 | 131.13 KB | |
| 1920 x 1270 | 252.92 KB | |
| 2916 x 1928 | 520.51 KB |
| Added On | 16th October 2015 |
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