摘要
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.
出处
《测绘科学》
CSCD
北大核心
2007年第6期69-71,共3页
Science of Surveying and Mapping
基金
信阳师范学院青年骨干教师资助计划
信阳师范学院青年基金资助项目(20060211
20050101)
关键词
线状要素
多尺度表达
数据不确定性
linear feature
multi-scale representation
data uncertainty