terrain-error
3.This paper presents an algorithm for regular square grid model, which based appropriate criterion and quad tree structure, the multi-resolution representation mechanism, the dynamic terrain simplification, error metrics, deleting cracks, fast generation the triangulation are discussed in the paper.
4.A brief reviews are made on the worldwide study of DEM accuracy, and then the technology and method of uncertainty analysis is presented for further research. The objective of the research must be clear as it defines and documents the conception of DEM terrain representation error and its uncertainty problems being studied in the work.
7.AN ANALYSIS OF THE WATERSHED TERRAIN FEATURES DERIVED FROM DEMS WITH DIFFERENT PRECISION AND A STUDY OF THE SLOPE ERROR CONTROL
9.The basic concept of terrain information content is proposed after an overall review of existing research achievement. Applying a series of analysis and data processing method, like math-analysis, mathematical statistics, comparative, error visualizing, this paper carefully investigated the terrain information content characteristic of DEMs of 1:50000 map scale of Loess Plateau Area.
10.Based on the Gauss weighted interpolation, in this paper, an improved project considering terrain factors has been brought forward, at the same time, with the correction project performed by Barnes, the corresponding error correction project and stepwise correction project have been given and the ground temperature field has been obtained.
