> 0.5 contour -Z0.5
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> 1 contour -Z1
-147.0743	60.8912032774	1
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> 1.5 contour -Z1.5
-147.0743	60.871457664	1.5
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> 2 contour -Z2
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> 2.5 contour -Z2.5
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> 3 contour -Z3
-147.1743	60.8234341699	3
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> 3.5 contour -Z3.5
-147.1493	60.8187882196	3.5
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