This paper studies the digitalcodingsystem in the cadastral information system; the method of querying and out-putting about figure data and attribute data;
论文还研究了地籍信息系统中的数据编码体系，图形数据和属性数据相互查询与混合输出的方法；
2
The application of system includes digital video coding and network transmitting protocols.
其系统应用涉及到数字视频编码和网络传输协议。
3
The paper presents a coding method need for digital transmission fault control in coal mine production and safety monitoring system, and also gives a flow chart of practical program.