> 0.9 contour -Z0.9
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> 1.8 contour -Z1.8
-150.5963	61.3900470837	1.8
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> 2.7 contour -Z2.7
-150.7213	61.3264373654	2.7
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> 3.6 contour -Z3.6
-150.6463	61.3266620416	3.6
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-150.6463	61.3266620416	3.6
> 4.5 contour -Z4.5
-150.6713	61.3052079421	4.5
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> 5.4 contour -Z5.4
-150.6213	61.3120286397	5.4
-150.599870552	61.3013793103	5.4
-150.5963	61.2956373742	5.4
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> 6.3 contour -Z6.3
-150.6213	61.3044756907	6.3
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-150.614581046	61.2765	6.3
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-150.6213	61.3044756907	6.3