获取数字三维地形成果主要涉及数据源、采集模式和生产流程个方面。
To gain the 3d digital topographic results mainly involves three aspects such as the data source, the processing mode and the production procedure.
DEM是地形表面的数字表达，易于三维可视化和统计分析。
DEM is a digital expression of landform surface, and is of great advantage to three-dimensional visualization and statistical analysis.
三维地形虚拟现实技术是当前计算机图形学、地理信息系统和数字摄影测量技术研究的热点问题。
The study on 3 D Terrain VR is a hot topic in Computer Graphic, Geographic Information System and Digital Photogrammetry.
在小区规划，园林设计等与三维地形有关的数字分析中，地表面积是经常用到的数据。
When community programming planed, surface area is usually used to express digital analyze about three dimension terrain.
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.
在三维地形有关的数字分析中，地表面积是经常用到的数据。
Digital Elevation model (DEM) is a common model of three dimension terrain, and digital analysis is mainly based on DEM.
地形、海洋、气象等环境影响下雷达电磁信息的三维表现是未来数字化虚拟战场环境不可回避的问题。
The 3D representation of Radar electromagnetic information affected by terrain, ocean and weather is a crucial problem in the future Digital Virtual Battlefield Environment (DVBE).
采用了地性特征点和地性线参与三维建模的方法，提高了数字高程模型DEM的地形逼真度。
Terrain fidelity of digital elevation model (DEM) can be enhanced by integrating terrain character points and terrain lines in the three dimensional model.
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.
针对由数字地图等以均匀网格形式给出的高程数据生成真实三维地形的仿真需求，提出了一种基于加权外推算法的地形几何模型。
For the requirements of creating 3d terrain based on the elevation data which is in the form of regular grid, a kind of modeling method based on weighted average algorithm is proposed.
GIS学者在研究三维地形可视化和数字城市可视化时，普遍在地形、城市建筑物的几何模型上叠加了纹理。
The scholars in the GIS domain always add adding texture on geometry model of the 3D things in the study on the 3D terrain and the digital city.
本文以教育部春晖计划——“基于网格的喀斯特地区数字博物馆的基础研究”为背景，结合遥感数字影像处理，研究三维真实感地形的建模和可视化方法。
As we know the build of third dimension scene needs a lots of real remote sensing images, theirs combination is one efficient way to high third dimension.
在此基础上，给出了三维数字地形交互显示的两种主要方式及实现方法。
Moreover, we also discussed the main two methods of drawing and displaying of it.
在此基础上，给出了三维数字地形交互显示的两种主要方式及实现方法。
Moreover, we also discussed the main two methods of drawing and displaying of it.
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