PROCEDURAL METHOD FOR TERRAIN SURFACE INTERPOLATION

A procedural method for scattered data interpolation is presented. The interpolating surface represents terrain surfaces used in Digital Ter rain Modeling (DTM). The construction provides visually continuous sur faces whose shape can be locally or globally controlled, can interpola te disconnected domains, and can maintain break lines or break triangl es, i.e. they can be forced locally to interpolate edges and triangles . Shape control and local interpolation properties are achieved throug h swung surfaces as basis functions defined for each data point over a small triangulated region. Copyright (C) 1996 Elsevier Science Ltd