An introduction is made to the design, development, and core technology of an expressway weather forecasting and service system based on GIS, taking Shaanxi Province as an example.
以陕西省为例，详细介绍了基于地理信息系统的高速公路气象预报服务系统的设计开发，以及系统的开发方法和核心技术。
Digitizing the gas pipe network is the core to realize GIS software, it can be realized through the method of combine space data with attribution data of the gas facility and equipment.
数字化燃气管网是GIS软件实现的核心，本文通过燃气设施设备的空间数据和属性数据相结合的方法得以实现。
The correct and reliable data is the core of GIS.
正确可靠的数据是GIS系统的核心。
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