> 0.7 contour -Z0.7
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> 1.4 contour -Z1.4
-171.0595	52.4398694073	1.4
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> 2.1 contour -Z2.1
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> 2.8 contour -Z2.8
-171.0345	52.3914618633	2.8
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> 3.5 contour -Z3.5
-170.9845	52.3966624167	3.5
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> 4.2 contour -Z4.2
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> 4.9 contour -Z4.9
-170.9845	52.3679655584	4.9
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