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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。
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。
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。
The core idea is based on a loading-on-demand technique which dynamically loads visible parts of the terrain model, then titling and rendering. 其核心思想是基于地形动态载入技术，对地形可见部分实时载入、拼接和渲染。
Thus, we partition a large terrain model into blocks and then dynamically load the necessary terrain blocks into the memory for rendering. 因此，我们将大区域地形模型切分成许多矩形小地块，并且动态地读取所需的小地块到记忆中来展示。
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。
The algorithm adopts OpenGL to make real-time visualization of view-dependent multi-resolution terrain model and import AutoCAD DXF document and Wavefront OBJ document reality. 最后,采用OpenGL实现了大规模地形的模型视点相关的多分辨率实时绘制,同时实现了AutoCAD的DXF文件和Wavefront的OBJ文件的导入。
The authors described the conception of index IRI on road surtace condifion,by establishing digital terrain model of international roughness index(IRI). 通过建立国际平整度指数(IRI)的数字地面模型来描述基于道路面状的IRI指标概念。
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。
Using those pre-event SPOT imageries and after-event SPOT imageries to derive the landslide inventories.The 40m 40m resolution digital terrain model was inserted to 20m grids. 数值地形资料的原始解析度为40公尺，经曲面内插为20公尺来使用。
Finally, the article establishes digital terrain model, makes scheme design, function design and program flow design on railwayyard"s profile and cross section design subsystem. 最后建立了系统数字地形模型，对铁路站场纵断面和横断面设计子系统进行了方案设计、功能设计和程序流程设计。
The DED data is got from IMAGE2DED conversion and is used in terrain modeling with the method of Delaunay. 通过Image2DED转换得到三维地形数组的数字高程数据信息,对该信息使用Delaunay法,生成对应三维地形数据的地形模型。
This paper puts forward the necessity of research on the probability of ALCM, and also establishes the model of ALCM’s clobber probability based on both the Butterworth terrain model and the Dryden atmosphere model. 提出了研究空射巡航导弹(ALCM)撞地概率的必要性,基于布特沃斯地形模型和德莱顿大气紊流模型,建立了ALCM撞地概率仿真模型。
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。

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