离奇的是，为什么他们建立这样的地形模型？
这是一个地形模型大约是0.7公里宽1公里高。
That's a terrain model 0.7 kilometer wide by almost 1 kilometer tall.
论述了一种基于规则格网地形模型的动态构网算法。
This paper discusses an algorithm of dynamic triangulation for RSG model of terrain.
利用距离幂反比法加分形插值算法建立了地形模型。
Established the landform model by distance power inverse ratio method and fractal interpolation algorithm.
本方法选用了简单实用的带状方格网式数字地形模型。
A simple and practical digital topographic model of the band-formed grid method has been chosen.
本文论述了一种基于规则格网地形模型的实时动态构网算法。
This paper discusses an algorithm of real-time dynamic triangulation for RSG model of terrain.
本文着重研究三维分形地形模型的构建及其可视化系统的实现。
This thesis focuses on the establishment of 3d fractal terrain model and the achievement of the visualization system.
本文还研究了通过扫描数字化等高线图建立数字地形模型的方法。
The methods to obtain the Digital Terrain Model (DTM) from contour map by scan digitizing were studied.
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。
Image matching is the key stage for digital Terrain Model (DTM) automatical aquisition using with digital images.
讨论在一个具体森林资源管理区域内建立和应用数字化地形模型的技术方法。
The paper discussed the method of setting up and applying digital topographic model for a certain area of forest resource management.
通过地形及土地利用图、数值地形模型和视线入射角来确定景观的被视频度；
The frequency degree of being visualized was determined by using the land utilization map, numerical model of topography and the incident angle of sight.
在总结前人所做工作的基础上，重点研究了不规则三角网地形模型的简化方法。
Based with the comprehensively summarization of the previous works, the simplification of Terrain Modeling of triangulated irregular network is studied.
论述了一种基于大规模格网数据或离散高程点动态构建多分辨率地形模型的算法。
This paper presents a dynamic construction algorithm for the multi-resolution terrain model based on the large scale GRID data or discrete elevation data.
在GIS支持下，利用土壤背景和数字地形模型可实现水土流失潜在可能性分析。
The soil erosion potential possibility can be studied using the soil background map and digital terrain map supported by GIS;
为实现立体像对的自动相对定向和数字地形模型自动生成提供了一种切实可行的方法。
This method has shown a good furture for automatic relative orientation and generation of Digital Terrain Models.
并提出用差分gps配合声纳测深进行动态连续定位，从而建立海底地形模型的设想。
The author proposed a tentative idea about forming the model of submarine terrain by the model of DGPS combining with Sonar system.
首次提出了基于多分辨率渐进层提取的三维地形模型纹理数据建立和渐进传输的方法。
The method of constructing and progressively transmitting 3D terrain texture data based on multi-resolution progressive layers is put forward for the first time.
数字地形模型是空间地形数据集合的统称，是具有空间位置特征和地形属性特征的数字描述。
Digital Terrain Model is a general designation of space topographical data set, and it is the digital description with the figure of space position and topographical attributive character.
实验证明，该方法对于实时控制地形模型的细节层次，增强地形模型的绘制效率是非常有效的。
The experiments show that this algorithm is very good for the real-time LOD controlling of terrain and also for the real-tim…
其次，重点研究了三维城市模型的构建，包括三维地形模型的建立，卫星影像与三维地形模型的融合。
Secondly, put more emphasis on the reconstruction of 3D city model, which involves the 3D terrain and the fuse of Ikonos and terrain.
数字地形模型是针对地形地貌的一种数字建模，这种建模的结果通常就是一个数字高程模型（DEM）。
Digital Elevation Model(DEM) is a digital modeling process which aims at terrain and physiognomy. Irregular triangulation TIN is the best model when DEM data are stored and expressed.
提出和改进了两种适合现阶段的基于四叉树(自适应四叉树和隐含四叉树)的实时动态多分辨率地形模型。
To represent dynamic multiresolution terrain in real time, two sorts of models suitable for current stage are proposed, the adaptive quadtree model and the implied quadtree model.
数字地形模型(DEM)包含着丰富的地形、地貌及相关的地学信息与知识，是GIS数字地形分析的数据基础。
As the data base of the GIS digital terrain analysis, digital Elevation Model (DEM) contains rich of terrain, topography and related geo-information and knowledge.
实验证明，该方法对于实时控制大规模地形模型的细节 层次，增强大规模地形模型的绘制效率是非常有效的。
The experiments show that this algorithm is very good of the real-time LOD controlling for large scale terrain visualization and also for the real-time rendering.
在该模型中，采用了一种新的与视点相依赖的动态误差度量准则，对四叉树地形模型的拼接缝消除算法进行了改进。
In this model, a new rule for evaluating view dependent dynamic error is adopted and the method of repairing the cracks intrinsically caused by quadtree data structure is also improved.
本视景系统从真实的电子海图数据中提取海洋地理信息数据库，并根据这些数据库建立海洋地形模型利实体模型库。
In this scene system, Derive ocean geographic information database from actual electronic chart data, and according to these database build ocean terrain and entity model database.
长周期动力地形模型是模拟长时间尺度地形演变过程的一种过程模型，其代表性输入条件是模型输入的一个关键问题。
The long-term morphodynamic model is used to simulate morphologic evolution process in a long time scale, its key is to define the model representative input condition.
对构筑三角形网格建立数字地形模型进行了研究，给出了基于散乱点和边建立三角形网格地形模型的生成算法和数据结构。
Generation of triangular meshes for digital terrain model is studied, the triangulation algorithm of discrete points and edges and its data structure are presented.
建立合理的三维地形模型，对于实现实时绘制虚拟地形场景，逼真模拟地形环境，实现虚拟地形环境中的分析功能及其它相关控制有着重要的意义。
It is significant to construct a suitable terrain model for real-time rendering terrain scene, simulating terrain environment in reality and achieving analysis functionality in VTE.
ROAM算法就是通过采用分解和合并方法实时地调整三角形网格，能交互式地实现观察依赖、局部可调整的地形网格化处理，生成多分辨率的地形模型。
ROAM method adopts split and merge operations to adjust triangle meshes, can interactively perform view-dependent, locally-adaptive terrain meshing and can construct multiresolution terrain model.
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