Keywords: 12in Repeating circle.jpg repeating circle NOAA's http //www photolib noaa gov/cgs/index html Historic C GS Coast and Geodetic Survey Collection Image ID http //www photolib noaa gov/htmls/theb1151 htm theb1151 http //www noaa gov/ US National Oceanic and Atmospheric Administration 1866 PD-USGov Theodolites Surveying in art |