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- digital elevation error 数字高程数据误差
- 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。
- The ACS switches from mode7 to mode3 when mode7 is not able to maintain a small elevation error while dealing with the azimuth error at the same time. 当模式7在处理方位角错误时无法同时维持较小的仰角错误时，acs会从模式7转换成模式3。
- 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。
- This paper studied the application of Fractional Brownian Motion (FBM) to terrain by Digital Elevation Map (DEM). 研究了分形布朗运动 (FBM)模型在DEM数字高程地形地貌分析中的应用 .
- 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;
- The three dimensional images of Taishan Mountain were obtained by covering digital elevation mode data with TM data on geographic information systenl (GIS). tm数据与数字高程数据复合，实现tm图像的立体显示，充分体现了地理信息系统的应用前景。
- 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。
- Extraction of digital drainage network from DEM(Digital Elevation Models) is the base of distribution hydrological model. The source of DEM are various. 基于数字高程模型DEM(Digital Elevation Models)提取水系信息，是研究分布式水文模型的基础。
- The research takes the Dexing Copper Mine in Jiangxi Province as an example to generate two Digital Elevation Models(DEMs) through different methods in 1986 and 2000. 以江西德兴铜矿矿山开采状况为例,采用两种方式分别建立了该地区1986年和2000年的数字高程模型(DEM)。
- 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)。
- 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;
- Use AutoCAD Raster Design software with AutoCAD software and applications based on AutoCAD to extend the value of scanned drawings and maps, aerial photos, satellite imagery, and digital elevation models. 创建富有感染力的演示方案，将具有丰富信息的光栅图像和智能矢量图结合在一起。
