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。

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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。

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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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