地形特征

同时本文的实验结果表明，基于坡度的抽稀算法，以及改进的基于TIN的抽稀算法对地形特征信息的保留能力较强。

The results of experiments show that thinning algorithm based on slope and improved thinning algorithm can keep better information on terrain features .

结果表明：与传统Delaunay三角网方法相比，利用联合Delaunay三角网和三角形局域连接方法能自动提取更完整的具有树结构的地形特征线。

The results show that terrain features extracted by the UDT model and JLT methods are more complete and possess tree structures than using the former Delaunay triangulation method .

基于DEM的地形特征信息提取技术的研究

Automated Extraction of the Characteristics of Topography from Grid DEM

基于三角网DEM的地形特征提取算法

Extracting Topographic Patterns Based on Triangulated Irregular Networks DEM

等值线DEM地形特征点提取与分类

Terrain Characteristic Point Extraction and Classification from Contour DEM

运用GIS空间分析工具，分析了地表温度与地形特征和地表覆盖类型之间的关系。

The relationships between topographic factors , various land cover types and the land surface temperature were analyzed using GIS spatial analysis tools .

InSARDEM精度与地形特征的关系分析

Analysis of the correlation between the InSAR DEM accuracy and topographic features

基于Delaunay三角网模型的等高线地形特征提取及谷地树结构化组织

Extraction of Landform Features and Organization of Valley Tree Structure Based on Delaunay Triangulation Model

通过分析比较，得出DEM水平分辨率对提取的地形特征及水文特征的影响，为马莲河流域的数字地形分析提供了理论依据。

The effect of DEM horizontal accuracy toward character of terrain and hydrological have been concluded based on analyzing and comparing .

地形特征值随着DEM网格增大按一定规律变化，为实际应用提供了依据。

The eigenvalue of terrain changes along with the increase of DEM grid size regularly so that the gist for practical application is supplied .

水流分配权重随局域地形特征变化的MFD；

MFD with the flow partitioning exponent varying with local topographic attribute ;

研究表明，本论文所提出的汇水盆地分析的理论方法和体系结构以及其模块的设计与实现，对于基于DEM的地形特征信息提取技术的研究具有重要的理论意义和应用前景。

The conclusions of the dissertation proved that , the theories and techniques of watershed basin analysis and application are of theoretical significance and have a splendid perspective .

在传统RD模型的基础上，根据不同地形特征（起伏地形和平坦地形）考虑不同的后向散射模型。

Based on the conventional RD model , different backscattering models are applied to simulation for different topographic characteristics , such as alpine terrain or flat terrain .

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。

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 ) .

顾及地形特征线的散点域（约束数据域）三角剖分是建立高精度数字地面模型的基础，在GIS、地学分析、计算几何、多分辨率DTM等领域中有着广泛的应用。

The triangulation of constrained data set is widely used in Geographic Information System ( GIS ), geo-science , computational geometry , multi-resolution and high precision DTM , et al .

AGV是一种陆地自主运动机器人，能够在具有一定地形特征的环境中顺利到达期望目的地或沿期望路径行驶。

Automated Guided Vehicles ( AGV ) can successfully reach its destination or move along a desired path in an environment characterized by a terrain .

无控制DEM匹配是在无地面控制点支持的情况下，由计算机自动提取DEM地形特征或几何信息来实现DEM匹配。

DEM matching without Ground Control Point ( GCP ) means that computers can automatically extract topographic features or geometric information from DEM to implement DEM matching without support of ground control points .

与其它空间数据结构相比，栅格DEM数据在提取地形特征时有着特殊的优越性，因此基于栅格DEM的数字地形分析技术在当今的地学应用中有着不同寻常的地位和意义。

It is more advantages that topographical information is extracted from grid DEM than from other spatial data . Accordingly , it is very important that the application of DTA based on grid DEM nowadays .

结果表明，导致SO2浓度高，降水pH值降低，与本地区的工业及生活用煤含硫量高，地形特征，地理环境，以及行星边界层的气象要素场和大气层结有密切的关系。

Results show that the increase of the density of SO2 and the decrease of the pH value of precipitation are closely related to the high sulphur content of the coal , topographical features , meteorological elementary field and atmospheric nodule of the planet boundary layer .

为此，对Delaunay三角网算法进行改进，采用四叉树结构来管理地形特征点、特征线和特征面数据。

Therefore , this article made an improvement to the Delaunay triangular net algorithm , used quadtrees structure to manage the characteristic point , the characteristic curve and the characteristic surface datum of terrain .

全面系统地介绍了基于规则格网DEM自动提取地形特征线的算法，在分析了这些算法特点的基础上，提出了设计更优算法的一些建议。

The existing algorithms for automatic extraction of terrain structure line based on digital elevation model data of regular grid are introduced . After the features of these algorithms are analyzed , design proposals for better algorithm are provided .

与流域产汇流有关的地理数据主要有地面高程和反映土壤、植被、地质、水文地质特性等方面的参数等，其中以反映流域地形特征的数字高程模型（DEM）最为有用。

The geographic data relate to generating and collecting runoff are mainly ground elevation and the parameters reflecting characteristic of soil , vegetation , geology , and hydrograph , especially digital elevation model ( DEM ) is the most useful .

简述结构算法并重点说明对该算法的改进，最后给出利用改进的结构算法在多尺度DEM数据中提取地形特征线的方法和实验过程。

It introduces structure algorithm briefly and emphasizes the improved structure algorithm in detail ; finally it shows the experimental method and process of extracting the characteristic line of terrain from the multi-scale DEM data by using the improved structure algorithm .

由流水网计算的流域平均汇流路径长度和坡度等地形特征值随DEM网格的大小而变，故只能作为描述地形的相对指标。

Some topographic indexes derived according to the drainage networks , such as the mean length of flow concentration routes and the mean gradient of hill slopes , vary with the grid-size of the DEM , so they can only be used as relative indexes .

AGV是一种自动导向车，能够在具有一定地形特征的环境中顺利到达期望目的地或沿期望路径行驶，已经被广泛应用于军事、航空和医药等领域。

AGV ( Automated Guided Vehicle ) can reach its destination or move along a desired path in an environment characterized by a terrain , which has been widely used in many fields such as military 、 space and medicine etc.

从模型合理性、算法复杂度和易用性、对DEM误差的敏感性等方面进行的分析表明，水流分配权重随局域地形特征变化的MFD优于其他三类MFD。

The discussion according to the rationality of model , complexity and practicality of algorithm , and sensitivity with the errors of DEM shows that the MFD with the flow partitioning exponent varying with local topographic attribute excels the other three types of MFD .

林冠孔隙度和土壤理化属性分别与不同的地形特征显著相关，显示了地形对林隙干扰和土壤侵蚀过程的控制。

Shown the topographic controls on gap disturbance and soil erosion .

不确定性空间关系顾及地形特征的等高线拓扑空间关系表达

Representation of topological spatial relations between contour lines based on terrain features

人正常晶状体前表面的非球面地形特征

Aspheric topographical features of the anterior surface of the human crystalline lens

西北太平洋海域海面动力地形特征的研究

On the features of the sea surface dynamic topography of Northwest Pacific Area