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- Algorithm to generate digital elevation model is studied based on random fractal. 本文研究了基于随机分形的数字高程模型算法。
- Algorithm to generate digital elevation model is studied based on random fractal . 本文研究了基于随机分形的数字高程模型算法。
- An information disguising and hiding technique is used to protect DEM (digital elevation model) data for store and transformation in this paper. 提出了一种结合信息伪装和隐藏技术来保护数字高程模型(digital elevation model;简称DEM)数据的方法;保证了DEM数据的安全传输和存储.
- DEM (digital elevation model) is a powerful tool for landform interpretation, and also an important method to express geomorphology quantitively. 数字高程模型，是地貌解译有力的辅助工具，同时也是对地形地貌分析研究进行量化表达的一个重要手段。
- And then digital elevation model(DEM) was extracted by a series of photogrammetric reduction processes such as relative orientation,image matching etc. 然后采用相对定向、影像匹配等摄影测量解析处理技术提取塌陷区地表的数字高程模型;
- Using ARC/INFO GIS technology,the raster Digital Elevation Model (DEM) and the average annual rainfall databases for nearly 30 years in the study areas were established. 研究利用 ARC/INFO地理信息系统 ,建立了研究区的栅格数字高程模型( DEM)及近 30年的年均降水量空间数据库 ;
- Synthetic aperture radar interferometry(InSAR) is a new technology to build the digital elevation model(DEM) and detect the tiny changes in the surface. 合成孔径雷达干涉测量(InSAR,Synthetic Aperture Radar)是一种获取地面数字高程模型(DEM)和探测地面微小形变的新技术。
- Phase unwrapping is one of the key steps for the processing of InSAR data.The quality of the unwrapping results affects the final DEM (Digital Elevation Model) directly. 相位解缠是SAR干涉测量数据处理中的一个关键步骤之一，解缠结果的好坏直接影响最终数字高程模型的精度。
- Triangulated Irregular Network (TIN) as a discrete numeric form presenting 3D surface is widely applied in such project fields as DEM (Digital Elevation Model). 不规则三角网(TIN)作为一种表现三维表面的离散数字形式在很多领域都有广泛的应用，最常见的如数字高程模型(DEM)。
- Triangulated Irregular Network(TIN) as a discrete numeric form presenting 3D surface is widely applied in such project fields as DEM(Digital Elevation Model). 不规则三角网(TIN)作为一种表现三维表面的离散数字形式在很多领域都有广泛的应用,最常见的如数字高程模型(DEM)。
- This dissertation is organized to first provide an overview of the InSAR theory, all kinds of decorrelation factors, and the error sources of the digital elevation model (DEM). 本文首先对干涉SAR的基本工作原理，影响干涉数据相干性的各种因素、数字高程图的误差来源等进行了系统阐述。
- Based on the field measured topographic data of the scour protection project of the main pylon pier of Sutong Bridge, a digital elevation model (DEM) is established. 摘要根据苏通大桥主塔墩基础冲刷防护工程区内的实测地形资料，建立数字高程模型(DEM)。
- At first, we construct a stimulant digital elevation model by a certain resolution in gauss surface and calculate gauss curvature of each grid point, which is regarded as true value to terrain simplification index. 首先对数学曲面(高斯合成曲面)按一定分辨率建立模拟DEM,由高斯曲面函数的数学表达式解析得到“真实”反映格网点附近表面形状变化的“真值”,即高斯曲率;
- Facing land use planning, an electronic sand table based on digital elevation model (DEM) and Landsat-7 ETM image is adopted and developed by Visual C++ 6. 0 and OpenGL, the data as a example is from Tonglu County, Zhejiang Province. 最后以浙江省桐庐县富春江流域为例;以数字高程模型(DEM)和美国Landsat-7卫星的ETM遥感影像为数据源;用VisualC++6.;0与OpenGL开发环境实现了该地区面向土地利用规划的电子沙盘的制作。
- In this paper, the concept of SDTM(Synthetic Digital Terrain Model) as a general condition model of civil engineering design is suggested and the original concept of DTM and DEM (Digital Elevation Model) enlarged. 本文提出了作为工程设计一般条件模型的综合数字地面模型的概念，对原数字地面模型概念进行了拓展。
- In this paper,a digital elevation model(DEM) for the Dagujia River basin in Shandong Peninsula was created by 3S techniques,and the precipitation in this basin was calculated by interpolation method. 应用3S技术生成数字高程模型(digital elevation model,DEM),解译出大沽夹河流域范围。
- The treatment and hydrology simulation analysis of digital elevation model (DEM) are discussed using ARC/INFO and ArcView of GIS software with an example of the Jiulong River Basin. 运用 GIS软件 ARC/INFO、ArcView,以九龙江流域为例,探讨了数字高程模型(DEM)的处理及其水文模拟分析。
- The treatment and hydrology simulation analysis of digital elevation model(DEM) were discussed using ArcGIS software and its Arc Hydro Tools extension with an example of the Shuangyang River watershed. 运用GIS软件ArcGIS、Arc Hydro Tools扩展模块,以双阳河流域为例,探讨了数字高程模型(DEM)的处理及其水文模拟分析。
- Digital Terrain Analysis (DTA) is a topographical information analysis technology to calculate and extract terrain surface parameters and morphological features on Digital Elevation Model(DEM), and the application of DEM is extended by DTA. 数字地形分析(Digital Terrain Analysis，DTA)是在数字高程模型DEM上进行地形属性计算和特征提取的数字地形信息处理技术，是DEM应用范围的拓广和延伸。
- Digital elevation model (DEM), as the essential sources of GIS, has become an important part of a national spatial data infrastructure (SDI) in many countries, under the umbrella of digital geospatial data framework (DGDF) . 数字高程模型(Digital Elevation Model,DEM)作为GIS重要的数据来源,已成为国家空间数据基础设施(National Spatial Data Infrastructure,NSDI)的基础内容之一,并被纳入到数字化空间框架(Digital Geospatial Data Framework,DGDF)进行规模化生产。
