> 1 contour -Z1
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> 2 contour -Z2
-169.5362	52.8209179795	2
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> 3 contour -Z3
-169.5112	52.7929892673	3
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> 4 contour -Z4
-169.5362	52.7686058806	4
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> 5 contour -Z5
-169.5362	52.753165124	5
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> 6 contour -Z6
-169.5112	52.7480145454	6
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> 7 contour -Z7
-169.5362	52.7213416598	7
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> 8 contour -Z8
-169.5112	52.7232501411	8
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