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地理信息系统(Geographical informa-tion system,GIS)出现于八十年代中期,很快传遍了世界各国。GIS是一个计算机软件包,涉及各种类型地理信息的获取、存贮、修改、咨询、显示及分析。GIS的发展是由于计算机软件及硬件技术的完善、改进,使得贮存在纸上的所有传统地理信息可以转化为适合于计算机处理的数字信号,这大大加快了地图绘制过程,使得计算机存贮及复原纸地图上的信息更为有效。GIS提供了一种集成式的计算机数据
Geographical information system (Geographical information system, GIS) appeared in the mid-eighties, quickly spread all over the world. GIS is a computer software package that covers the acquisition, storage, modification, consultation, display and analysis of all types of geographic information. The development of GIS is due to the improvement and improvement of the computer software and hardware technologies, so that all the traditional geographic information stored on the paper can be converted into digital signals suitable for computer processing, which greatly accelerates the mapping process and enables the computer to store and restore The information on the paper map is more effective. GIS provides an integrated computer data