Algorithms for Extracting Correct Critical Points and Constructing Topological Graphs from Discrete Geographical Elevation Data.

Shigeo Takahashi Tetsuya Ikeda Yoshihisa Shinagawa Tosiyasu L. Kunii Minoru Ueda Algorithms for Extracting Correct Critical Points and Constructing Topological Graphs from Discrete Geographical Elevation Data. 181-192 1995 14 Comput. Graph. Forum 3 db/journals/cgf/cgf14.html#TakahashiISKU95 http://dx.doi.org/10.1111/j.1467-8659.1995.cgf143_0181.x