结合我国基础地理数据库的情况, 提出了基于版本数据库的变化信息提取和更新发布的技术路线。

以道路要素为例, 分析了其具体实体变化情况, 论述了变化信息提取中的匹配方法, 给出了变化信息的内容定

义, 并提出变化信息更新的思路。-We develop a technique workflow of extraction and implementation of change- on2

ly information based on version databases, we take road features as an example to analyze the

change types of realistic entities, discuss the object matching method in the process of ex2

traction of change- only information. Finally, we give the definitions of change- only infor2

mation and the updating mechanism of user. s database based on change- only information