http://trac.osgeo.org/geos/ticket/488
TopologyException unioning two valid polygons.
Cause is very high precision causing almost-coincident line segments.
This causes robustness failures in noding in JTS 1.12
01060000000100000001030000000100000005000000DF52A140EC490340251EBD88237048404F7F9BC7814D0340D9C5653E1270484041B01B9F1C4C0340A9FB014212704840002EF0471C4C0340EC39718803704840DF52A140EC490340251EBD8823704840
01060000000200000001030000000100000004000000EF54EBB0384B03403FC50B78F36F484040B01B9F1C4C0340A9FB0142127048404F7F9BC7814D0340D9C5653E12704840EF54EBB0384B03403FC50B78F36F4840010300000001000000040000008D246CEE344E034016CFC66D597048404F7F9BC7814D0340D9C5653E1270484041B01B9F1C4C0340A9FB0142127048408D246CEE344E034016CFC66D59704840
01030000000100000007000000DF52A140EC490340251EBD8823704840E66E8AF0484C034079579A23187048408D246CEE344E034016CFC66D597048404F7F9BC7814D0340D9C5653E12704840EF54EBB0384B03403FC50B78F36F484032DCBFEACF4B034080B385E507704840DF52A140EC490340251EBD8823704840