线状要素多尺度表达的不确定性评价研究  

General Analyzing and Estimate Research on Uncertainty of Multi-scale Representation of Linear Feature

作　　者：徐丰[1] 牛继强[1] 

机构地区：[1]信阳师范学院城市与环境科学系,河南信阳464000

出　　处：《信阳师范学院学报（自然科学版）》2007年第4期525-527,共3页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(40471107);信阳师范学院青年基金资助项目(20060211);青年骨干教师资助计划

摘　　要：首先确立线状要素多尺度表达的实现方式;然后紧紧围绕线状要素多尺度表达的实现流程,分析线状要素多尺度表达不确定性的来源,并利用误差传播规律建立线状要素多尺度表达误差传播规律;最后通过实验得出线状要素在尺度扩展中不确定性的变化规律.为线状要素多尺度表示的质量评价提供了理论基础.Firstly, the implementation way of multi-scale representation of linear feature is determined. Secondly, based on the procedure of multi-scale representation of linear feature, the source of uncertainty is analyzed, and the error spreading law of multi-scale representation of linear feature is established with error spreading law. Finally, the change rule of the uncertainty in the upscaling of linear feather is obtained by experiment. This paper provides the theory basis of quality evaluation of multi-scale representation of linear feature.

关 键 词：线状要素 多尺度表达 数据不确定性 

分 类 号：P208[天文地球—地图制图学与地理信息工程]