Firstly, a research of the calculation of noise prediction model based on GIS, noise impact index, as well as the database design are conducted; Secondly, VB6.
首先对基于GIS的噪声预测模型计算、噪声冲击指数计算，以及数据库设计等关键技术问题进行了研究，然后选择了VB6。
Some relative key techniques including the design of 3D data model, database management based on Oracle, the fusion between CAD data and GIS data, sunlight analysis and so on are emphasized.
对涉及到的关键技术包括三维数据模型的实现、二维数据的嵌入与操作、日照分析关键技术等都进行了详尽的介绍。
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