期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII Part B4
页码：709-714
出版社：Copernicus Publications
摘要：In web based GIS visual simulation systems, the DEM multi-scale presentation and lossy-to-lossless progressive compression and transmission based on integer-to-integer wavelet transforms can eliminate the redundant data between resolutions. Therefore, it can relieve effectively the contradiction between the voluminous DEM data set and the limited network bandwidth. Among the many integer-to-integer wavelet transforms, which one is the most suitable to the DEM multi-scale representation and compression with high accuracy in every resolution has not been set forth. Thus, 15 different reversible integer-to-integer wavelet transforms are compared when compressing the DEM data with multi-scale progressive characteristic via the JPEG2000 algorithm, and these comparisons are mainly focused on their accuracy performance of maintaining the main original terrain characters in different resolutions. The terrain accuracy parameters are selected elaborately to better indicate the accuracy performance of different wavelet transforms. Theses transforms' lossless compression performance and computational complexity are also considered. Through a lot of experimental data and analyses, the 2/6 integer wavelet transform is found to be the most suitable transform for the DEM multi- scale representation and progressive compression. Factors affecting these performances are also discussed through theoretical arguments, which could be a guide to design new and more effective integer wavelet transforms for DEM progressive compression
关键词：DEM; Multi-scale Representation; Compression; Geographical Services; Web Based
