R树索引树的代码,用于空间数据库索引，是先进比较流行的数据库索引算法-R-tree index tree code, the index for spatial databases, advanced database indexing algorithm more popular

　介绍如何对运行于Oracle9 i关系数据库的ArcSDE数据进行备份与恢复,防止存储介质的 意外损坏导致严重的空间数据损失,防止由于用户误操作引起的数据丢失。-How right Oracle9 i relational database running on the ArcSDE data backup and recovery, to prevent accidental damage to storage media lead to serious loss of spatial

主要写了orcale数据库的应用，主要是对空间数据的检索等等内容，对你会有一定的帮助。-Mainly to write a orcale database applications, mainly for spatial data retrieval and much more, there will be some help to you.