> 4 contour -Z4
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> 8 contour -Z8
-146.3667	69.3543910653	8
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> 12 contour -Z12
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> 16 contour -Z16
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> 20 contour -Z20
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> 24 contour -Z24
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> 28 contour -Z28
-146.2667	69.2021531104	28
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-146.2667	69.2021531104	28