应用数字高程模型(DEM)对公路两侧的地形进行三维分析,为京化高速公路的道路设计提供科学有效的依据。在实现过程中利用航空正射地形影像图和数字高程模型建立了可实时显示和浏览的京化高速公路路段三维模型,这对于高速公路的选线、绕避不良地质灾害的发生和开凿公路隧道的位置选择等具有很大的参考价值。 Using the digital elevation model (DEM) to conduct 3D analysis of the topography on both sides of the road, it provides a scientific and effective basis for the road design of Jinghua Expressway. In the process of realization, a three-dimensional model of road sections of Beijing-Huaihua Expressway that can be displayed and browsed in real time is established by using aerial orthographic terrain images and digital elevation models, which avoids the occurrence of adverse geological disasters and excavated road tunnels The location of choice has a great reference value.