I have read through all the papers and the codes on the JTS. It seems a pretty good chance for me to implement the geometry operation into the DTMap.
Two key issues will be considered: 1> Robust issue . 2> Graph Algorithm.
It is pretty enjoyful to read through those codes, and I can feel the difference between me and those people who wrote the jts. Have been working for about four years, but I am still not statisfied the code which I wrote.