地理数据访问对象方面，介绍了采用面向对象技术设计实现的地理数据访问类。
In the case of geographic data access objects, the paper illustrates the geographic data access class realized by oriented-object technology.
地理数据访问对象方面，介绍了采用面向对象技术设计实现的地理数据访问类。
In the case of geographic data access objects, the paper illustrates the geographic data access class realized by oriented-object technology.
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