DEM技术在景观工程道路选线中的应用

数字高程模型(DEM)既是二维地理空间上具有连续变化特征的地理现象的模型化表达和过程模拟,又是空间起伏连续变化现象的数字化表示和分析工具的集合。道路工程是DEM应用最早的领域。在道路勘测设计中,通过高精度DEM,可以进行平面、纵断面的交互定线,横断面的自动生成、土方计算与调配、道路的多方案比选,并通过设计表面模型和DEM叠加,实现道路景观模型及动画演示,从而对设计质量进行评价,并对拟建道路与周围环境的协调状况进行分析。

Application of DEM in road selecting of landscape project

The digital elevation model(DEM) is not only the geographic phenomenon's simulating expression and the process simulation of the continuously change character in the two-dimensional geographic space,but also a set which is a spatial continuously fluctuant phenomenon's digital expression and an analytic tool.The road engineering is the earliest field which DEM is employed in.In the road survey and design process,DEM can be carried on the plane,the longitudinal section,the cross section automatic production,the equalization of earthwork alternately with mixes,and the path multi-plans compared to elects.It also can realize the path landscape model and the animation demonstration by the design surface model and DEM superimposition.Thus DEM can make evaluations on the design quality,and analyzes the harmonious situation between the building road and surrounding.