> 1 contour -Z1
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> 2 contour -Z2
-157.8	55.2927490041	2
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> 3 contour -Z3
-157.85	55.2445998404	3
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> 4 contour -Z4
-157.825	55.2209673521	4
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> 5 contour -Z5
-157.85	55.1980091021	5
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> 6 contour -Z6
-157.875	55.1700593363	6
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> 7 contour -Z7
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> 8 contour -Z8
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