然后研究了基于规则格网的三维地形建模方法。
Then the method of 3-d terrain modeling based on regular grid is studied.
本论文从分形布朗运动，三维地形建模和虚拟环境三个方面逐步进行了深入讨论。
The three aspect of the dissertation was discussed: fractal Brownian motion, 3D modeling and visual environment.
三维地形建模及可视化是GIS、计算机图形学、虚拟现实、数字摄影测量等领域的研究热点。
3d terrain modeling and visualization are hot research topics in GIS, computer graphics, virtual reality, digital photogrammetry and other associated fields.
数字高程模型(DEM)是一种常用的三维地形建模数据模型，三维地形的数字分析主要是针对dem模型的。
Digital Elevation ModeI (DEM) is a common model of three dimension terrain, and digital analysis is mainly based on DEM.
三维地形可视化仿真技术是虚拟现实的重要手段之一，主要研究真实感三维地形建模和三维地形可视化的实时绘制。
Visual 3D terrain simulation technology is an important means of virtual reality, which deals with realistic 3D terrain modeling and 3D terrain visualization real-time drawing mainly.
分析了三维地形动态建模的表现方法及特点，并将地形动态建模研究的重点放在基于空间数据改变的动态地形建模上。
Analyzing the performance method of 3d terrain dynamic modeling and it's characters, and set the point to the terrain dynamic modeling based on the change of space data.
与陆地地形建模相比，水下地形的多分辨率建模是一个逆向的过程，它通过较为少量但非常有价值的数据来建立水下地形的拓扑结构。
Compared with modeling on ground terrain, modeling on underwater terrain is a converse process. It takes a few but valuable data to establish topological structure.
洪水演进仿真环境的绘制包括三维地形建模和地形地貌实时绘制，源发型洪水演进动态仿真技术的关键是流域河道边界自搜索模型的建立。
The key technology of the dynamic simulate of the original flood evolvement is the design of the self-control search model of the boundary of the watercourses drainage area.
由于上海中心城区建筑密集，地形复杂，一直是三维建模的重点和难点。
As the Shanghai downtown construction-intensive, complex terrain, has been the focus of three-dimensional modeling and difficult.
文中介绍了高等级公路三维视景的建模过程、实现方法，以及地形的简化技术。
This paper introduced the modeling process and realization method and terrain simplification of the freeway three-dimensional scene.
多分辨率建模作为解决大面积静态地形实时动态显示的手段，近年来在国内外得到普遍的重视和研究。
Multiresolution modeling, which is used to resolve the real-time rendering of large scale static terrain, has attracted growing interest at home and abroad over the last decade.
多分辨率建模作为解决大面积地形实时动态显示的手段，近年来在国内外得到普遍的重视和研究。
Multiresolution modeling, used to resolve the real time rendering of large scale terrain, has attracted growing interest over the last decade.
第四章是洋山港地区地形三维建模研究。
Chapter four is the study of terrain three-dimension modeling of Yangshan Harbor area.
目前三维地层表面建模方法构建的三维地层模型上表面粗糙，与地形不一致。
Three dimensional strata model, constructed by the published modeling approaches, is inconsistent to the terrain.
重点研究了AMDB数据绘图映射和建模方法、机场三维模型与地形的合成显示技术。
The AMDB mapping and modeling method, the synthesis display technology of airport 3D model and terrain were studied emphatically.
本文对井喷事故发生地实际复杂地形地表的三维模型的建模方法的进行了探讨。
This paper blowout accident occurred in the actual surface of the complex terrain of the three-dimensional model of the modeling methods were discussed.
对场景的地形构造、纹理映射、LOD技术、实例调用等建模技术细节进行了深入探讨。
The technique details of the terrain generation of scene, texture map, LOD and transferring instance are discussed.
对虚拟森林环境的建模技术进行深入探讨，主要内容包括虚拟地形的构建和林木的几何重建技术。
We deeply discuss the techniques on geometric modeling. Under the condition of simulating virtual forest landscape, the primary landscapes are terrain and the tree.
分析了以往软件开发中存在的各种问题，指出以往针对小比例尺地形数据创建的建模平台已不能很好地满足现在的应用要求。
It indicates that the former modeling platform which was established based on the small scale terrain data can not meet the current application requirements finely.
此问题的建模对于钴结壳的厚度检测，及微地形起伏的检测等也有重要的指导意义。
The modeling and analysis in this paper will supply some important reference to detecting the depth of the cobalt-rich crust and the fluctuant Microtopography of the cobalt crust.
给出了一种同时利用数字高程模型和正射图的精确后向散射建模方法，并由此得到了三幅具有不同地形特征的SAR实时图。
A precise backscatter modeling method using digital elevation model and orthography is proposed, and three SAR real-time images with different terrains are simulated based on it.
此问题的建模对于钴结壳厚度及微地形起伏的检测也具有重要指导意义。
The modeling and its analysis in this paper will supply some important references to detecting the depth of the cobalt-rich crust and the fluctuant microtopography of the cobalt crust.
在对城市景观主要建模对象进行分类的基础上，建立了三维空间数据结构，实现了地形和地物模型三维重建的系列算法。
Based on the classification of the primary modeling objects in the city scene, we separately rebuild the model of the terrain and objects according to the 3d spatial data structure.
所谓的LOD建模，其实质就是采用一定的算法思想将原有的网格地形数据进行重组，得到一种更加便于实时绘制使用的数据结构。
In reality, in order to get more convenient data organization for drawing, LOD model is to use theory of algorithms to reform intrinsic grid topographic data base.
地形曲率是地形表面几何形态和地学建模的基本变量之一。
Terrain curvature is one of fundamental variables in geomorphology and geoscience modeling.
围绕提高建模算法的效率和改进模型表示地形的逼真度与精度等问题，研究了顾及地形特征约束条件下不规则三角网t IN的建模方法和改进措施。
In order to improving modeling efficiency and model fidelity, the author studies the modeling methods and improving measure on constructing tin considering limitation of terrain character.
在前者中，针对于各种景物的特点提炼出了相应的建模方法，并提出了将显示列表、地形分割和顶点删除法相结合的地形简化绘制方法，实现了较大规模地形的实时显示；
The simplicity of drawing method is proposed by combine the method of displaying list, terrain segmentation and vertex removing, which fulfilled the real-time display of a great scale terrain.
提出了基于TM算子的地形动态规划方法，实现了高自由度的地形局部建模。
A dynamic terrain planning method based on TM operators is put forward in this paper, which makes it possible to modify terrain at will.
软件设计上完成了 常规的CIG算法编程，坦克在3D场景数据库中的地形匹配、碰撞检测，场景中活动目标设置等问题的建模与编程。
In CIG software design, the regularCIG algorithm programing, topographic matching, collision testing and moving target processingmodulars in tank 3D scenery database have been accomplished.
软件设计上完成了 常规的CIG算法编程，坦克在3D场景数据库中的地形匹配、碰撞检测，场景中活动目标设置等问题的建模与编程。
In CIG software design, the regularCIG algorithm programing, topographic matching, collision testing and moving target processingmodulars in tank 3D scenery database have been accomplished.
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