The relative system, such as vector graphicsystem, database system, and space information system, are discussed in the paper, the basic principle and realize method are discussed in the paper also.
The system can provide the drawing of basicgraphic element, the connection with attribute database, and meet the basic need of the field management.
该系统能够实现基本图形元素的绘制，并能与其属性数据进行连接，能够满足农田管理的基本需求。
3
The classification of class in interactive graphicsystem is proposed firstly by the basic primitive class, static aggregation class and dynamic aggregation class.