The total length of the Golmud to Lhasa Section (G-L Section) of Qinghai-Tibet Railway is 1142 km. Its the longest plateau railway running through plateau permafrost soil with the highest altitude, al
At first, the forming conditions and developing characteristics of several kinds of typical harmful features related to frozen ground are discussed in the paper, such as flooding ice, icing mound, fro
分辨率是基于地形测绘数据插值生成DEM的基本问题。利用合适的分辨率既可使生成的DEM如实反映和描述地面地形特征,又可避免引入新误差。基于地貌学原理,以读取基础数据所有信息和有效表达地貌特征为目标,利用多种栅格DEM的坡度均方差-栅格尺寸关系曲线,结合对插值DEM上地貌特征的分析,可以客观地确定地形图插值生成DEM的合适栅格尺寸。系统介绍了这种方法的基本原理,并以黄土高原1∶25万地形图插值生成DE
本文解释了3D-GIS的概念及特点,总结了3D-GIS在场地分析中的作用,并阐述了3D-GIS在场地专项分析中应用的实例以及存在的问题。
Regional core cities are the growth poles for regional economic development, thus the issue about efficient urbanization pattern has always become a hot spot among researchers and policy makers. The S