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：2002
卷号：XXXIV Part 4
出版社：Copernicus Publications
摘要：Line simplification is an important function in GIS and cartography and is widely used in commercial GIS software packages. Most line simplification algorithms require the user to supply a tolerance value, which is used to determine the extent to which simp lification is to be applied.. All simplification algorithms induce positional errors in the data set, because they produce a discrepancy between the original line and its simplified version. The amount of this error depends on both the tolerance value and the shape of the line. This is the reason that many researchers have focused on measuring the geometric characteristics (or complexity) of lines. Using one tolerance value for all lines in the data set results in different positional errors for different lines. What is usually important for the user, is to maintain a specific level of quality, and not the tolerance value itself. The question is, 'ho w does one specify a tolerance value for each line based on the user specified level of accuracy'. This paper presents a solution to solve this problem. In this approach, the user supplies the target level for desired accuracy and the simplification tolerance value is calculated accordingly
关键词：line simplification; complexity o f line; adaptive tolerance value; ; positional error
