收集的地理实况数据包括1：5万的地形图和根据该地形图经数字化处理生成的数字高程模型(dem)。
The collected ground true data includes topography map with scale of 1:50 000 and the corresponding Digital Elevation Model (DEM).
在基于等高线建立的数字高程模型TIN中，由平坦三角形连接成的平坦区域不能真实地反映地表的真实形状，需要进行适当地修正。
IN TIN of digital elevation model constructed from contours, flat areas which are made up of flat triangles can not reflect the real shape of the surface, so that they need be corrected properly.
探讨了基于DEM的VLL物方影像匹配方法、多尺度表达的数字高程模型，以及自适应窗口大小和变化阈值的确定等用于三维变化检测的关键技术。
And many key techniques such as VLL matching, multi-scale DEM, self-adapted matching window and thresholds for the framework are discussed and investigated deeply.
在模型参数求取中应用了GIS的数字高程模型(DEM)功能将海图等深线通过线性内插得到与模型网格相匹配的具有栅格结构的水深数据(模型的主要参数)。
Water depth data (main parameters), which was matching to model's grid structure, was obtained by using the function of GIS digital elevation model (DEM) to linear-interpolate the isobath of chart.
利用GIS方法建立了数字高程模型（DEM），研究了子汇水面积的边界。
By means of GIS method, the digital elevation model(DEM)is established, the subcatchment boundaries are studied.
建立这些数字高程模型，有无数的用途，可以帮助军用飞机超低飞行，可以给救济工作人员显示地震的哪里破坏最大。
Their digital elevation model will have myriad USES, from helping military jets fly ultra low to showing relief workers where an earthquake's damage is worst.
首先介绍了数字高程模型的基本知识，及其在水文中应用。
At first, the basic knowledge of DEM and its application in the hydrology were introduced.
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。
Phase unwrapping is one of the key steps for the processing of InSAR data. The quality of the unwrapping results affects the final DEM directly.
基于数字高程模型（DEM）中提取流域水系是分布式水文模拟的基础与关键。
The foundation of the simulations lies on how to obtain hydrologic and topographic parameters from Digital Elevation Model(DEM).
数字高程模型(dem)是人们研究地表过程、构造地貌的一种行之有效的方法和手段。
Digital elevation model (DEM) analysis is one of the most effective methods for studying surficial processes and geomorphology.
结合数字高程模型的特点，对土石方工程量格网法计算方法进行改进。
Combined with the digital elevation model characteristics, this paper improves the grid method that is used to calculate earth-rock volume.
利用三线阵c CD图像自动提取数字高程模型(dem)的关键问题是立体像对的匹配相关技术。
The key problem to generate automatically the digital elevation model (DEM) by three-line CCD camera for photographic measurement is the stereo image matching technology.
数字高程模型(dem)是记录地形起伏变化的资料，当中蕴含着各种地形地貌的结构信息，其中包括山谷线和山脊线。
Digital Elevation Model (DEM) records topographic fluctuation changes and in which it contains various topographic construct information including valley lines and ridge lines.
在遥感与GIS技术的基础上，应用数字高程模型(DEM)生成的格网模型进行洪水的淹没分析。
Based on remote sensing technology the GIS grid model generated by digital elevation model (DEM) is utilized to analyze the flood submergence.
基于地球同步卫星定位原理，分析了当利用数字化地形图提供测站高程时测站的多解和无解现象。
According to the Earth synchronous satellite positioning principle, multi-results and non-results are analyzed when the station height is given using DEM.
从制作技术、数据检查、质量管理等方面分析了数字高程模型数据库的建设。
This paper analyzes on the construction of DEM database from the making technique, data checking and quality control.
干涉合成孔径雷达是获取场景数字高程模型和正射影像图的有效技术之一。
Interferometric Synthetic Aperture Radar is an effective technique to get Digital Elevation Model and orthophoto map.
数字高程模型(dem)是重要的基础地理信息数据，在军事和民用领域有着重要的应用价值。
Digital elevation model (DEM) is the fundamental infrastructure of geographical information systems and has wide applications in both military and civil areas.
这两个模块的结合，实现了遥感影像、矢量地图、数字高程模型以及三维场景数据的统一管理和调度。
All of these two modules achieve unified management and scheduling about remote sensing images, vector maps, digital elevation models and three-dimensional scene data.
本模型只需数字高程模型(dem)就可计算太阳直接辐射、日照时间和简化的散射辐射。
The model presented here only USES a digital elevation model (DEM) to compute direct solar radiation, time of irradiation and simply diffuse radiation.
如何评估利控制数字高程模型建立过程中各种数据的质量，是建立各种类型数据库和地理信息系统的“瓶颈”问题。
However, how to evaluate and control the quality of all sorts of data in the course of building DEM is a bottleneck problem of establishing various type databases and GIS.
本文研究了利用航天遥感影像自动提取数字高程模型（DEM）的方法技术，建立了一整套利用SPOT影像提取DEM的方案。
This paper discusses the methods of automatic extraction of digital elevation model (DEM) from remote sensing image. A system of scheme is established to extract DEM from SPOT image.
说明了实现人工阴影和人工立体观察像对的方法的基本原理及其在处理数字高程模型数据上的应用；
The Principles of the techniques about shaded relief and synthetic stereo-pair viewing of images as well as their application in digital elevation model data processing are described.
机载激光点云数据滤波是获取高精度数字表面模型和数字高程模型的关键。
Airborne lidar point cloud filtering is the key of acquiring DSM and DEM with high precision.
分析了DMA的DTED和USGS的DEM高程数据存储格式，比较了其异同，提出了一种高效的数字地图高程数据的存储格式并实现了存取算法。
Analyzing the storage format of DMA DTED and USGS DEM and then presenting a new digital terrain elevation data storage format. The storing and reading algorithm are also realized.
应用纹理映射技术将TM影像与数字高程模型结合，实现准动态监测湿地的水文变化。
TM image and DEM are combined using texture mapping technology, thus realizes monitoring the hydrological change of wetland dynamically.
数字高程模型(DEM)是一定区域范围内规则格网点的平面坐标及其高程的数据集或者是经、纬度和海拔高度的数据集。
DEM (Digital elevation Model) is a data set of plane coordinate or longitude, latitude, and elevation of the regular square grid points in some region.
最后分析了数字地图的高程精度对定位精度的影响。
At last, the influence of digital map's height accuracy was analyzed.
研究数字高程模型(DEM)在滑坡地表排水辅助设计中的应用。
This paper studies the application of digital elevation model (DEM) to the design of the surface drainage ditch system.
研究数字高程模型(DEM)在滑坡地表排水辅助设计中的应用。
This paper studies the application of digital elevation model (DEM) to the design of the surface drainage ditch system.
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