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。
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。
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.
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