David Blasby writes: > > Has GEOS been updated to the new JTS 1.3? Good question ? I noticed $ source/bigtest/TestSweepLineSpeed.exe # overlapping MCs: 406 # segment intersection tests: 232 n Pts: 1024000 Executed in 3806 ms. Done PIII 733 slightly modified GEOS code This is much faster then the last time I tried this Norman