Abstract
Taking the construction of the main line of Lianhuo Country Road (GZ45) and the Highway from Niubei (Baoji ) to Tianshui for example, this paper, which is mainly considered from the data pretreatment, the build of virtual reality digital models, cut-fill and 3-D flying simulation, discusses the following methods, including VR-GIS techniques and basic geographical information data such as digital elevation model (DEM), digital orthography map(DOM), digital line map(DLG), and their application in the scheme selection, building design, environmental protection and project feasibility analysis.
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