Isabelle Krome Papers, 1903-1976 - Town Hall Museum

Figure 6 Change in Magnetic Variation vs Rock Field 40. Figure 7 Triangulation scheme for Sycamore 80. Figure 8 Plot of GPS and Triangulation of Sycamore 82. Tables. Table 1 Length of 1 arc second in feet, and datum shift 20. Table 2 Magnetic Variation listed in Treaty Line Survey Notes 31. Table 3 Topographic maps along line 46 ................
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