> 3 contour
173.24	50.9686	3
173.323	50.9712	3
173.407	50.9704	3
173.49	50.9591	3
173.573	50.9371	3
173.636	50.9048	3
173.657	50.8918	3
173.723	50.8215	3
173.738	50.7382	3
173.716	50.6548	3
173.657	50.5948	3
173.626	50.5715	3
173.573	50.5397	3
173.49	50.5149	3
173.407	50.5011	3
173.323	50.4994	3
173.24	50.5069	3
173.165	50.5715	3
173.157	50.5796	3
173.073	50.6536	3
173.072	50.6548	3
173.041	50.7382	3
173.068	50.8215	3
173.073	50.8271	3
173.157	50.9036	3
173.158	50.9048	3
173.24	50.9686	3
> 6 contour
173.24	50.8673	6
173.323	50.8938	6
173.407	50.8955	6
173.49	50.8801	6
173.573	50.8321	6
173.586	50.8215	6
173.623	50.7382	6
173.577	50.6548	6
173.573	50.6513	6
173.49	50.5955	6
173.407	50.5773	6
173.323	50.5807	6
173.24	50.6113	6
173.195	50.6548	6
173.16	50.7382	6
173.191	50.8215	6
173.24	50.8673	6
> 9 contour
173.323	50.8566	9
173.407	50.8671	9
173.49	50.8369	9
173.514	50.8215	9
173.565	50.7382	9
173.511	50.6548	9
173.49	50.6401	9
173.407	50.6051	9
173.323	50.6216	9
173.27	50.6548	9
173.24	50.7023	9
173.22	50.7382	9
173.24	50.7768	9
173.265	50.8215	9
173.323	50.8566	9
> 12 contour
173.407	50.8387	12
173.447	50.8215	12
173.49	50.7984	12
173.537	50.7382	12
173.49	50.6786	12
173.452	50.6548	12
173.407	50.633	12
173.339	50.6548	12
173.323	50.662	12
173.261	50.7382	12
173.323	50.8192	12
173.33	50.8215	12
173.407	50.8387	12
> 15 contour
173.323	50.7786	15
173.407	50.8124	15
173.49	50.7626	15
173.509	50.7382	15
173.49	50.714	15
173.407	50.6601	15
173.323	50.7001	15
173.292	50.7382	15
173.323	50.7786	15