> 1 contour -Z1
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> 2 contour -Z2
-169.6108	52.8769781899	2
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> 3 contour -Z3
-169.6358	52.8393784883	3
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> 4 contour -Z4
-169.5858	52.8317063994	4
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> 5 contour -Z5
-169.6108	52.8100562228	5
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> 6 contour -Z6
-169.5858	52.8049949115	6
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> 7 contour -Z7
-169.5858	52.7921191122	7
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> 8 contour -Z8
-169.5858	52.7791381778	8
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