STRIPACK - DELAUNAY TRIANGULATION AND VORONOI DIAGRAM ON THE SURFACE OF A SPHERE

STRIPACK is a Fortran 77 software package that employs an incremental algorithm to construct a Delaunay triangulation and, optionally, a Vor onoi diagram of a set of points (nodes) on the surface of the unit sph ere. The triangulation covers the convex hull of the nodes, which need not be the entire surface, while the Voronoi diagram covers the entir e surface. The package provides a wide range of capabilities including an efficient means of updating the triangulation with nodal additions ,or deletions. For N nodes, the storage requirement for the triangulat ion is 13N integer storage locations in addition to 3N nodal coordinat es. Using an off-line algorithm and work space of size 3N, the triangu lation can be constructed with time complexity O(NlogN).