prBoundaryString='( (0.01 0.02) (0.0 1328.23) (0.01 0.02) (0.04 0.53) (0.03 44.23)
   (0.0 1328.23) (0.04 0.53)
 )

-x0=0.01
-y0=0.02
-x1=0.0
-y1=1328.23
-x2=0.01
-y2=0.02
-x3=0.04
-y3=0.53
-x4=0.03
-y4=44.23
-x5=0.0
-y5=1328.23
-x6=0.04
-y6=0.53