> 20 contour
26.6543	-27.9403	20
26.7377	-27.9285	20
26.814	-28.0043	20
26.755	-28.0877	20
26.7377	-28.1059	20
26.6543	-28.0963	20
26.6478	-28.0877	20
26.6056	-28.0043	20
26.6543	-27.9403	20