Further Study on Three Dimensional Douglas-Peucker Algorithm and Its Application to Generalization of DEM

Compared to the general 3-D Douglas-Peucker algorithm put forward by the authors in the previous publication,further improvements and expansion of the algorithm are discussed.Experimental results prove that these measures can greatly heighten the efficiency of the DEM generalization with satisfactory results,and offere us the practical possibility of on-the-fly global generalization of DEM with huge volume of data.