line offset:	1036.6101	2992.5125	6794.2175	 804.4201
line slope:	 853.4856	 987.4904	 970.8447	1209.4568
slope ratio:	   0.8643	   0.8027
subtract ped line offset:	-10184.6482	-18270.8348	-18081.8070	-13390.8841
subtract ped line slope:	 854.6268	 952.5316	1003.1051	1232.3840
slope ratio:	   0.8972	   0.8027
offset:	-10052.4232	-20245.2551	-16402.0194	-12290.4802
x a,b,c:	  -0.1336	   1.1287	   0.0381
y a,b,c:	   0.5199	   1.2307	  -0.0882
fval:	   0.0516	   0.1079
x err:	   0.2544	   0.1489	   0.2063
y err:	   0.2503	   0.2013	   0.1486