line offset:	3875.1647	4722.1510	14694.6990	9918.7168
line slope:	1113.1345	1122.4492	1172.0692	1361.7735
slope ratio:	   0.9917	   0.8607
subtract ped line offset:	-9089.8912	-5590.3661	-13919.1581	-11045.3246
subtract ped line slope:	1113.0466	1122.4002	1173.2270	1362.6277
slope ratio:	   0.9917	   0.8607
offset:	-9113.2735	-5605.4550	-13836.2798	-10946.1450
x a,b,c:	  -0.1902	  -1.0169	   0.0409
y a,b,c:	   0.0894	   1.1622	   0.0573
fval:	   0.1825	   0.1481
x err:	   0.2287	   0.1420	   0.1793
y err:	   0.2514	   0.2134	   0.1329