line offset:	 939.6984	9240.2467	8859.0501	2467.2159
line slope:	 699.3220	1061.4487	1253.6879	 795.4243
slope ratio:	   0.6588	   1.5761
subtract ped line offset:	-8941.2389	-17713.5479	-28969.3020	-9998.5175
subtract ped line slope:	 698.0447	1062.5332	1252.2240	 794.7123
slope ratio:	   0.6570	   1.5761
offset:	-9036.2215	-17632.9020	-29078.1605	-10051.4599
x a,b,c:	  -0.0768	   1.1044	   0.0330
y a,b,c:	  -0.3348	   1.1897	  -0.0728
fval:	   0.0469	   0.1390
x err:	   0.2491	   0.1516	   0.1976
y err:	   0.2362	   0.1782	   0.1550