line offset:	1217.2138	9115.8670	8855.0006	1970.5535
line slope:	 643.2563	1060.0974	1363.4020	 665.7420
slope ratio:	   0.6068	   2.0479
subtract ped line offset:	-9187.3867	-20547.1298	-23648.8423	-8802.9321
subtract ped line slope:	 639.6078	1050.6008	1380.5607	 666.2604
slope ratio:	   0.6088	   2.0479
offset:	-9514.0426	-21397.3796	-22112.5964	-8756.5209
x a,b,c:	  -0.5382	   1.1337	   0.0332
y a,b,c:	   0.6307	   1.1880	  -0.1259
fval:	   0.2317	   0.4226
x err:	   0.2384	   0.1713	   0.1657
y err:	   0.2866	   0.2360	   0.1626