A compact terrain model based on critical topographic features

This paper describes a triangulation method which builds a DTM from a series of critical line features such as elevation contours, ridge and valley lines, and other breaklines. The method described is an improvement over current techniques because it triangulates any set of critical lines without human intervention, retains the original lines in the triangulation, adds no more than four points to the data, and runs relatively fast. Implementation results are given at the conclusion of the paper. -from Author