【作者】 应申； 李霖； 刘万增； 王红；

【Author】 YING Shen1, LI Lin1 , LIU Wanzeng2, WANG Hong1 (1.School of Resource and Environment Science,Wuhan University, Wuhan, 430079,China;2. National Geomatics Center of China , Beijing 100044 , China)

【机构】 武汉大学资源与环境科学学院； 国家基础地理信息中心；

【摘要】 采用基于变化信息的增量更新方法为地理信息的更新提供了一种全新的方法,增量式更新是指在主数据库更新过程中或之后,只记录或提取发生变化的特征及其信息,然后将这些信息以增量(Delta)文件的方式提供给用户,并集成到原来客户数据库中的过程。本文结合我国基础地理数据库情况,提出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,分析其具体实体变化情况,论述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。更多还原

【Abstract】 Incremental updates based on change-only information provide a novel approach for geographic data updating. Incremental updates only record the change-only information and characteristics in master database between different version datasets, and deliver these delta information to client users and integrate them into client database. The paper develops the technique workflow of extraction and implementation of change-only information based on version database. We take road features as example to analyze the change types of realistic entities and discuss the object match method in the process of extraction of change-only information. Also we give the definition of change-only information and the idea about updating mechanism of user’s database based on change-only information.更多还原