> 1 contour -Z1
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> 2 contour -Z2
-169.5264	52.7485429513	2
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> 3 contour -Z3
-169.5014	52.7237867101	3
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> 4 contour -Z4
-169.4514	52.7164813656	4
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> 5 contour -Z5
-169.4764	52.6946201035	5
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> 6 contour -Z6
-169.4264	52.6931739533	6
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> 7 contour -Z7
-169.4514	52.6760479998	7
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-169.4514	52.6760479998	7