地理信息系统中数据库间数据交换技术的研究

鉴于地理信息系统中数据交换信息量巨大,提出利用数据交换通信平台(DECP)作为中间层,来实现异构数据库之间的数据传输和交换。DECP由数据访问层、业务逻辑层、安全代理、数据传送代理、客户代理、消息层、事务管理器七个部分组成。DECP所采用的关键技术是基于代理的安全技术、系统调度、异构数据库的访问和事务的调度和管理。

Study on Data Exchange among Heterogeneous Database in Geographic Information System

Too much information exchanged is the major characteristic of data exchange in distributed GIS. The data exchange communication platform (DECP) is put forward as the middle layer to realize data exchange and transmission among heterogeneous database. DECP is made up of data access layer, business logic layer, security proxy, data transport proxy, client proxy, messages layer and transactions manager. The key technologies adopted by DECP mainly are the security technology based on proxy, the technology of system scheduling, the technology of accessing heterogeneous database management systems and the technology of transaction management and scheduling.