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This paper discussed digital terrain model (DTM) . 论述了地面数字模型DTM(Digital terrain model).
Image matching is the key stage for Digital Terrain Model(DTM) automatical aquisition using with digital images. 利用数字影像自动提取数字地形模型(DTM)的关键是影像匹配。
Digital terrain model (DTM) is an important component of a resource information system. 数字地形模型(DTM)是资源信息系统中的重要组成部分。
Digital Terrain Modeling (DTM) is an important utility of GIS. 数字地形模型是GIS的一个重要应用。
A method is presented to implement real-time 3D road animation coupled with road design data and digital terrain model(DTM). 研究了一种用数字地面模型和公路设计数据实现实时三维动画的方法。
Firstlythe digital terrain model is constructed using Delaunay triangulation technique, and then the road design data is merged into the DTM. 首先利用Delauany三角化方法构造数字地面模型,然后将公路设计数据与数字地面模型进行叠加。
In this paper the methods and experiments for applying the digital terrain model(DTM) to improve the classification accuracy are introduced. 本文着重介绍在遥感影象分类中应用数字地面模型(DTM)改正地物反射光谱中地形影响的方法和试验。
To generate regular grid digital terrain model (DTM) from scattered points, the key problem is to improve the efficiency of searching neighbor points. 从离散点内插规则格网数字地形模型 (DTM)方法的关键是如何提高待插点周围数据的搜索效率。
To counter the splice problem of digital terrain model (DTM) the paper puts forward the algorithm of cutting out of splice line to triangle network. 该文针对数字地面模型(DTM)的拼接问题提出了基于拼接线对三角网进行裁减的算法,并对其基本原理及主要过程进行了详细介绍。
In the generation of traditional orthophotos, we employ RPCs and Digital Terrain Model (DTM) to rectify tilt displacements and relief displacements for terrain. 利用此物像关系及数值地形模型进行传统正射改正。
Airborne 3D imager which integrates global positioning system, attitude measurement unit, scanning laser range finder and spectral imager can produce geo-referenced image and digital terrain models (DTM) without ground control points. 机载三维成像仪是集成了全球定位系统 (GPS)、姿态测量装置、激光测距仪和光谱成像仪的新一代航空遥感系统 ,它能直接得到地学编码影像和数字地面模型 (DTM) ,而无需地面控制点。
The base data of the quantitative analysis about land feature and the automatic drawing of topographic map is furnished by Digital Terrain Model(DTM),it is the basics of Geography information System(GIS). 数字地面模型为多种地形特征的定量分析与地形图的自动化绘制提供了基本数据，它是建立土建CAD和地理信息系统的基础。
In order to obtain DTM(Digital Terrain Model),which is the principal work for data processing in various engineering on ground,some study is carried out on site,but a majority of DTM results from photogrammetry. 为了获得各种地面工程数据管理的基础,建立DTM(数字地面模型)是一项主要工作,多数DTM来源于摄影测量的成果。
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。
To counter the splice problem of digital terrain model (DTM) the paper puts forward the algorithm of cutting out of splice line to triangle network. It also introduces for details the basic principle and the main course. 该文针对数字地面模型(DTM)的拼接问题提出了基于拼接线对三角网进行裁减的算法,并对其基本原理及主要过程进行了详细介绍。
Digital Terrain Model display two demission geographic position and relational properts information with digital pattern. DTM is an important component of Gis,and is basic of "digital earth". 数字地面模型(Digital Terrain Model,DTM)是地表二维地理空间位置和其相关的地表属性信息的数字化表现，是地理信息系统(Geographic Information System,GIS)的重要组成部分，是数字地球的基础。
The Visualization of DTM(Digital Terrain Model) is the main research content of GIS(Geographic Information System) > RS(Remote Sensing) and DP(Digital Photogrammetry),it has very important value in economic and military. 数字地面模型的可视化是地理信息系统(GIS)、遥感(RS)和数字摄影测量(DP)的重要研究内容，它具有重要的经济和军事应用价值。
A method of estabisihing digital terrain models(DTM) with TIN is introduced, and problems during modeling are discussed in the paper. Furthermore,application problems about the hybrid model,as well as the data structure of TIN,are analyzed. 介绍了用不规则三角网(TIN)建立数字地面模型(DTM)的基本思路;讨论了在建模过程中所遇到问题的解决方法;分析了混合模型的应用问题及TIN数据结构.
The constrained digital terrain model is displayed in AutoCAD which is developed by VC++6.0 and ARX. 通过使用VC++6.;0和ARX开发工具;在AutoCAD环境下实现了约束DTM的建立和显示。
The achievements of this thesis can besummarized as fOllows:Present a simple description of DTM(Digital Terrain Model) and the technology ofterrain modeling with reguIar and irregular terrain data. 1）在对数字地面模型建模方法进行简要小结的基础上，对基于规则格网和不规则三角网的地形建模技术进行了研究。

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