Algorithm of isoline tracing with fault lines

This paper proposed an algorithm combined with topological structure of triangulation. Firstly,the algorithm regarded edges coincided with fault lines as boundary edges. Secondly searched all reasonable regions,internal points and interpolated special points and endpoints of fault lines by judging the edge type consisting of region boundary. Lastly could get isoline with fault lines. This algorithm can deal with all kinds of special situation effectively and realize simply after testing with a lot of date.