line offset:	1657.5511	7393.3228	33222.4364	2759.5471
line slope:	 578.6369	1211.8091	 328.9016	1179.8336
slope ratio:	   0.4775	   0.2788
subtract ped line offset:	-8957.7760	-22875.8258	1515.5532	-8009.4250
subtract ped line slope:	 578.6369	1211.8091	 328.9016	1179.8336
slope ratio:	   0.4775	   0.2788
offset:	-8957.7760	-22875.8258	1515.5532	-8009.4250
x a,b,c:	   2.0941	   0.9322	  -0.0977
y a,b,c:	   0.6092	   1.1756	  -0.1250
fval:	   0.7544	   0.3358
x err:	   0.1925	   0.0876	   0.1714
y err:	   0.2660	   0.2285	   0.1362