测绘科学技术学报2013，Vol.30Issue(2)：191-196,6.DOI:10.3969/j.issn.1673-6338.2013.02.019
面状要素渐进式传输中几何信息传递状况的定量分析方法
A Quantitative Analysis of Geometrical Information Transfer in Progressive Transmission of Area Features
摘要
Abstract
As an efficient way of data transmission over Web,the progressive transmission plays an important role in the multi-representation of spatial data.It is able to meet the need of different levels of spatial information for the users,thus reaches to the efficiency of map service.Quantitative analysis of spatial information content in the process of progressive transmission makes it possible to control the real time transmission process.For this purpose,the changes accumulation model of an area feature was taken as the model of information transfer,and further the information theory was employed to analyze quantitatively the geometrical information transferred in the progressive transmission of area features.Firstly,a partition bases on convex hull of an area feature was proposed from the view of spatial cognition and a quantitative measurement of the information content for a convex hull was proposed.Secondly,a set of evaluation indicators of transmission information were put forward to the quantitative analysis of transfer status.Finally,an experiment was provided to prove the accuracy and efficiency in controlling the transmission process of the proposed method to improve the geometrical information transmission efficiency.关键词
渐进式传输/信息量/变化累积模型/面状要素/信息传递Key words
progressive transmission/ information measurement/ changes accumulation model/ area feature/ information transfer引用本文复制引用
刘慧敏,何占军,邓敏,徐震..面状要素渐进式传输中几何信息传递状况的定量分析方法[J].测绘科学技术学报,2013,30(2):191-196,6.基金项目
国家自然科学基金项目(41171351) （41171351）
中南大学中央高校基本科研业务费青年教师助推项目 （）
江西省数字国土重点实验室2012年度开放基金项目(DLLJ201204). （DLLJ201204）
