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Radar Terrain Analysis 雷达地形分析
The flow direction algorithm based on gridded DEM is an important component of digital terrain analysis. 基于栅格DEM的流向算法是数字地形分析的重要研究内容之一。
Using C++ language and OpenGL Graphic Library to implement the algorithm of 3D terrain analysis and terrain visualization, and this algorithm has become part of vega3DGIS. 使用C++语言和OpenGL图形库编写了有关三维地形分析，三维地形可视化的算法，并为Vega3DGIS所采纳。
The conversion between Grid DEMs and TINs is of critical significance in digital terrain analysis which is a key work in the watershed planning of the loess plateau region. 栅格DEM与TIN是DEM表面建模主要的2种方法。应用DEM进行地形分析时,栅格DEM与TIN的相互转换非常必要,但在转换中所产生的误差直接或间接地影响到分析结果的准确性。
The main content of Geomorphology research is terrain analysis, it includes such as height slice analysis, slope analysis, gully density analysis and so on. 地貌学研究的重要内容之一是地形分析，主要包括高程剖面分析，坡度、坡向分析以及沟壑密度、切割深度、起伏度、流域分析等。
In this dissertation, focused on the aerial image matching based terrain data acquisition and DEMs based digital terrain analysis, some theory, approach and key technical problem of digital terrain modeling are discussed. 本论文围绕着数字地形模拟的相关理论方法和关键技术问题进行了讨论，其中重点研究了基于航空遥感影像的地形数据获取和基于DEM的数字地形分析问题。
Digital Terrain Analysis (DTA) is a topographical information analysis technology to calculate and extract terrain surface parameters and morphological features on Digital Elevation Model(DEM), and the application of DEM is extended by DTA. 数字地形分析(Digital Terrain Analysis，DTA)是在数字高程模型DEM上进行地形属性计算和特征提取的数字地形信息处理技术，是DEM应用范围的拓广和延伸。
three-dimensional terrain analysis 地形三维分析
They picked up the yacht on their radar screen. 他们在雷达屏上看到了那艘游艇。
Tactical Terrain Analysis Data Base 战术地形分析数据库
Terrain Analysis Production System 地形分析生成系统
United States Army Terrain Analysis Center 美国陆军地形分析中心
The radar scanned the sky for enemy planes. 雷达密切监视天空，搜索敌机。
The watchtower followed the aircraft by radar. 瞭望塔通过雷达追踪这架飞机的行踪。
Enemy ships were detected on the radar screen. 敌舰的影像已显现在雷达(屏幕)上。
The commander made a detailed study of the terrain. 司令员对地形作了仔细研究。
The signal was picked up by a downrange radar station. 该信号被试验飞行方向之内的雷达站收到了。
A gunboat was detected by the radar. 雷达探测出一炮艇。
Enemy aircraft were detected by our radar. 敌机被我方雷达发现。
The ship was provided with radar equipment. 那船装有雷达设备。