线状要素多尺度表达不确定性的综合分析与评价研究

General analysis and estimate research on uncertainty of multi-scale representation of linear feature

空间数据的多尺度表达和GIS数据的精度分析及质量控制问题是当今地理信息科学和国际GIS界十分关注的两大前沿课题。本文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。

Firstly,this paper states the implementation method of multi-scale representation of linear feature.Secondly,based on the processing of multi-scale representation of linear feature,the paper analyzes the source of uncertainty.What's more,it establishes the error spreading law of multiscale representation of linear feature making use of error spreading law.Finally,it designs a case to show the changing law of uncertainty at the upscaling of linear feature.This paper provides the theory foundation of quality estimation of Multi-scale Representation of Linear Feature.