> 0.5 contour -Z0.5
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> 1 contour -Z1
-169.5088	52.863030466	1
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> 1.5 contour -Z1.5
-169.5088	52.8137416032	1.5
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> 2 contour -Z2
-169.4838	52.7934966787	2
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> 2.5 contour -Z2.5
-169.4338	52.7868833206	2.5
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> 3 contour -Z3
-169.4588	52.764259546	3
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> 3.5 contour -Z3.5
-169.4088	52.7617193397	3.5
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> 4 contour -Z4
-169.4338	52.7413988922	4
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