line offset:	2907.3786	13951.4390	16774.5879	4159.3308
line slope:	1174.2770	 568.8074	1128.6691	 702.9213
slope ratio:	   2.0645	   1.6057
subtract ped line offset:	-7667.9461	-16039.7606	-15094.5823	-6630.1838
subtract ped line slope:	1174.0503	 566.9559	1131.1169	 702.9282
slope ratio:	   2.0708	   1.6057
offset:	-7683.7282	-16168.6534	-14924.1790	-6629.7020
x a,b,c:	   0.1196	   1.0640	   0.0042
y a,b,c:	   0.0697	   1.1344	  -0.1162
fval:	   0.3043	   0.3551
x err:	   0.2235	   0.1547	   0.1614
y err:	   0.2194	   0.1641	   0.1456