line offset:	1250.3325	9225.5542	15991.3024	3585.6841
line slope:	 864.5109	 961.4606	 767.2290	1195.0131
slope ratio:	   0.8992	   0.6420
subtract ped line offset:	-8227.0041	-14585.1385	-23954.0885	-10092.1086
subtract ped line slope:	 858.9412	 940.0949	 796.9386	1205.7406
slope ratio:	   0.9137	   0.6420
offset:	-8527.9281	-15721.1708	-22337.5622	-9505.5093
x a,b,c:	   1.2987	   1.0430	   0.0221
y a,b,c:	  -0.8345	   1.1799	  -0.0926
fval:	   0.6995	   1.0200
x err:	   0.1849	   0.1133	   0.1462
y err:	   0.2369	   0.2065	   0.1161