> 0.7 contour -Z0.7
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> 1.4 contour -Z1.4
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> 2.1 contour -Z2.1
-169.8978	52.6912128202	2.1
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> 2.8 contour -Z2.8
-169.8478	52.6836014918	2.8
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> 3.5 contour -Z3.5
-169.8728	52.661782737	3.5
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> 4.2 contour -Z4.2
-169.8478	52.6569713052	4.2
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> 4.9 contour -Z4.9
-169.8478	52.6442350663	4.9
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