RESEARCH ON DATA CONSISTENCY IN SPATIAL DATABASE SYSTEM

In this paper,two cases of data consistency problems are discussed in Multi_user Geographical Information System.When a user updates some spatial data that have been accessed by other users in database,or executes an UNDO/REDO operation,data consistency will probably be destroyed.To solve the problem caused by the first case,a “Notification_Reread Method" is introduced.As for the second case,there are many problems to be studied.

GIS中多用户环境下数据共享一致性问题研究

讨论了GIS中多用户环境下数据一致性问题，着重研究了由于某个用户修改其他用户已读数据所产生的不一致以及由于用户UNDO/REDO后产生的不一致。对于前者，本文提出了一种“通知-重读”法。