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
A new solution of combination network of GPS and high precise distance measurements with EDM is proposed. Meanwhile, it’s inadvisable only using GPS network without distance measurements. Three scheme