> 0.7 contour -Z0.7
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> 1.4 contour -Z1.4
-172.0846	52.4028273921	1.4
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> 2.1 contour -Z2.1
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> 2.8 contour -Z2.8
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> 3.5 contour -Z3.5
-172.0096	52.3596593685	3.5
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> 4.2 contour -Z4.2
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> 4.9 contour -Z4.9
-172.0096	52.3309557586	4.9
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