There are data obtaining and updating system, Database system, network system, industry spatial data engineering system and data standard system in the engineering collectivity.
工程总体包括数据获得和更新体系、数据库体系、网络体系、行业空间数据工程体系和数据标准体系等。
With ADO and DAO as database access interface, this system makes the connection between attribute data and spatial data, and the updating of database information come true.
系统采用ADO和DAO作为外部数据访问接口，实现属性数据与空间数据的连接和数据库信息的更新。
Incremental updating will be next major trends of the database because of its flexibility and better way to ensure the real time of spatial data.
增量更新由于其方式灵活而且能够更好地保证空间数据的现势性，是未来数据库更新的主要趋势。
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