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One degree of longitude at the equator = 69.2 miles. As you go North or South, one degree of longitude decreases in size as the latitude increases. The Width Compressor factor indicates how much a map distance at the equator should be shrunk or compressed for the given latitude. | ||||
Degree | Width | Height | ||
Latitude | = Miles | Compress | Expand | |
0 | 69.2 | 1.00 | 1.00 | |
5 | 68.9 | 1.00 | 1.00 | |
10 | 68.1 | 0.98 | 1.02 | |
15 | 66.8 | 0.97 | 1.04 | |
20 | 65.0 | 0.94 | 1.06 | |
25 | 62.7 | 0.91 | 1.10 | |
26 | 62.2 | 0.90 | 1.11 | |
27 | 61.7 | 0.89 | 1.12 | |
28 | 61.1 | 0.88 | 1.13 | |
29 | 60.5 | 0.87 | 1.14 | |
30 | 59.9 | 0.87 | 1.16 | |
31 | 59.3 | 0.86 | 1.17 | |
32 | 58.7 | 0.85 | 1.18 | |
33 | 58.1 | 0.84 | 1.19 | |
34 | 57.4 | 0.83 | 1.21 | |
35 | 56.7 | 0.82 | 1.22 | |
36 | 56.0 | 0.81 | 1.24 | |
37 | 55.3 | 0.80 | 1.25 | |
38 | 54.6 | 0.79 | 1.27 | |
39 | 53.8 | 0.78 | 1.29 | |
40 | 53.1 | 0.77 | 1.30 | |
41 | 52.3 | 0.76 | 1.32 | |
42 | 51.5 | 0.74 | 1.34 | |
43 | 50.7 | 0.73 | 1.36 | |
44 | 49.8 | 0.72 | 1.39 | |
45 | 49.0 | 0.71 | 1.41 | |
46 | 48.1 | 0.70 | 1.44 | |
47 | 47.3 | 0.68 | 1.46 | |
48 | 46.4 | 0.67 | 1.49 | |
49 | 45.5 | 0.66 | 1.52 | |
50 | 44.5 | 0.64 | 1.56 | |
51 | 43.7 | 0.63 | 1.58 | |
52 | 42.7 | 0.62 | 1.62 | |
53 | 41.8 | 0.60 | 1.65 | |
54 | 40.8 | 0.59 | 1.69 | |
55 | 39.8 | 0.58 | 1.74 | |
60 | 34.7 | 0.50 | 1.99 | |
65 | 29.3 | 0.42 | 2.36 | |
70 | 23.7 | 0.34 | 2.92 | |
75 | 18.0 | 0.26 | 3.84 | |
80 | 12.1 | 0.17 | 5.72 | |
85 | 6.0 | 0.09 | 11.53 | |
90 | 0.0 | 0.00 | ~~ |
USA Relief Maps ~ Digital Wisdom Inc ~ PO Box 11 ~ Tappahannock VA 22560 ~ USA
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