关键词: GIS, 数据库, 地理信息系统数据库, 数据模型, SDE, 面向对象

Abstract: GIS is now widely used in many fields. In these applications, it is very important to organize and managethe spatial data well. The GIS database is a good tool for this field. The database technique has developed for along time. Meanwhile it have suceeded in many applications and there have been many large scale database producers, such as ORACLE, INFORMIX, SYBASE, DB 2 and SQL SERVER. There are many data models thatcan be used in these database, but the relational model is most popular. Though the relational model has a lot ofadvantages, it is difficult to represent sophisticated objects in the world, especially for the geographic objects. The geographic object have two kind of data: spatial data and attribute data. To attribute data, it is easy tostore in the relational database ; but to spatial data, it is difficult to do so- With the development of GIS and theapplication needs, it is required to integrate the attribute data and spatial data in one commercial DBMS. Muchresearch has been done to find a way to implement it. ARC/SDE is produced for this aim by ESRI CO, yet itdoes not work perfectly. So it is necessary for us to find a new technique to solve the problem. Object orientedtechnique will serve it well and it continue developing to a perfect level. Object oriented technique becomes morepopular for 00 PL and Database now. It is excellent to use 0 bject Data Model for representing the object in theworld, especially for GIS Database.It is proved that it is benefit to use the 0 bject—Oriented 'Technique in a lotof application work. At last, the paper discuss the trends of the Geodat abase.

Key words: object oriented technique, GIS, database