line offset:	1685.3812	15093.5933	26851.4336	4728.6912
line slope:	 853.8789	 819.3803	 502.9712	1167.4350
slope ratio:	   1.0421	   0.4308
subtract ped line offset:	-8065.1085	-8562.5331	-11392.1558	-8625.5833
subtract ped line slope:	 854.6355	 792.5088	 492.6017	1171.0353
slope ratio:	   1.0784	   0.4308
offset:	-8021.9997	-9050.4692	-11911.8723	-8604.8405
x a,b,c:	   3.9886	   0.8543	  -0.0183
y a,b,c:	  -2.6350	   1.0423	  -0.0532
fval:	   0.6934	   1.1122
x err:	   0.2652	   0.1548	   0.2152
y err:	   0.2243	   0.1738	   0.1418