The unified modeling language (UML) is an object-oriented and strictly defined visualizing data modeling language. It has been gradually adopted in analysis and design of GIS application engineering.
统一建模语言（UML）是一种面向对象、定义明确的可视化系统建模语言，在地理信息系统工程的分析和设计中已逐渐被采用。
The application of geographic information system(GIS)in the risk analysis of buried gas pipeline is studied with the engineering example in a certain city.
结合某市工程实例，探讨了地理信息系统在埋地燃气管道风险分析中的应用。
Considering existing circumstance of GIS application in Hydroelectric engineering construction layout, GIS-based construction layout visualization information system is built.
本文结合GIS在水利水电工程施工总布置可视化研究中的实际应用情况，建立了基于GIS的施工总布置可视化信息系统。
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