基于BLOB的空间数据存取方法研究与应用

摘要

首先介绍了数据库存储大二进制字段的技术,分析了SDE空间数据存取方法及其特点,提出一种利用大二进制对象存取空间数据的技术方案,并利用实际数据进行了测试与对比.实验表明,本文方法在一定程度上简化了SDE中利用ArcEngine读取和写人记录的问题,提高了空间数据检索效率.%The paper introduced the binary large objects technology in database, and studied the Read-Write method based on the SDE for the spatial data. Then it advanced a kind of project based on the binary large objects for managing the spatial data, and implemented it by a demo data. It was proved that the project resolved a problem at a certain extent, that it is troublesome to make use of ArcEngine reading and writing the notes, and improved the efficiency of searching the spatial data.