line offset:	17115.8545	21458.0115	17757.4066	45009.7271
line slope:	 408.7427	 512.4375	 424.0636	1074.8746
slope ratio:	   0.7976	   0.3945
subtract ped line offset:	12151.3609	7941.8387	-1259.6361	38769.4382
subtract ped line slope:	 290.1859	 189.6586	 -30.0813	 925.8506
slope ratio:	   1.5300	   0.3945
offset:	7186.8673	-5574.3342	-20276.6789	32529.1493
x a,b,c:	  -8.3401	   0.1798	  -0.0573
y a,b,c:	   1.9927	   0.8723	   0.0912
fval:	   0.0001	   0.0013
x err:	   0.3688	   0.3002	   0.2142
y err:	   0.3656	   0.2117	   0.2981