line offset:	21469.2735	21753.8625	53797.9065	19544.0404
line slope:	 512.8433	 519.6414	1285.0876	 466.8547
slope ratio:	   0.9869	   2.7527
subtract ped line offset:	14983.3610	16601.8381	39486.7427	9034.2612
subtract ped line slope:	 357.9123	 396.5733	 943.2323	 215.8043
slope ratio:	   0.9025	   2.7527
offset:	8497.4485	11449.8136	25175.5788	-1475.5179
x a,b,c:	  -2.4864	  -0.7623	   0.0687
y a,b,c:	   0.3281	   0.8834	   0.0485
fval:	   0.5026	   0.3673
x err:	   0.1598	   0.1320	   0.0900
y err:	   0.1939	   0.1508	   0.1219