line offset:	1320.7083	12279.9950	19485.1722	3848.8152
line slope:	 863.0878	 890.4747	 688.5412	1189.5886
slope ratio:	   0.9692	   0.5788
subtract ped line offset:	-8429.2521	-12301.4270	-19025.6677	-9372.6704
subtract ped line slope:	 863.8430	 886.8668	 684.7437	1189.8199
slope ratio:	   0.9740	   0.5788
offset:	-8386.6726	-11864.0675	-19278.1337	-9484.7165
x a,b,c:	   2.1748	   0.9930	   0.0103
y a,b,c:	  -1.8157	   1.1204	  -0.0786
fval:	   0.6850	   1.0696
x err:	   0.3501	   0.2206	   0.2719
y err:	   0.2464	   0.1873	   0.1601