例如，数字高程模型(Digital Elevation Model,DEM)数据点在网格图形中均匀排列。
For example, Digital Elevation Model (DEM) data points are equally arranged in a grid pattern.
相位解缠是SAR干涉测量数据处理中的一个关键步骤之一，解缠结果的好坏直接影响最终数字高程模型的精度。
Phase unwrapping is one of the key steps for the processing of InSAR data. The quality of the unwrapping results affects the final DEM directly.
说明了实现人工阴影和人工立体观察像对的方法的基本原理及其在处理数字高程模型数据上的应用；
The Principles of the techniques about shaded relief and synthetic stereo-pair viewing of images as well as their application in digital elevation model data processing are described.
在模型参数求取中应用了GIS的数字高程模型(DEM)功能将海图等深线通过线性内插得到与模型网格相匹配的具有栅格结构的水深数据(模型的主要参数)。
Water depth data (main parameters), which was matching to model's grid structure, was obtained by using the function of GIS digital elevation model (DEM) to linear-interpolate the isobath of chart.
从制作技术、数据检查、质量管理等方面分析了数字高程模型数据库的建设。
This paper analyzes on the construction of DEM database from the making technique, data checking and quality control.
这两个模块的结合，实现了遥感影像、矢量地图、数字高程模型以及三维场景数据的统一管理和调度。
All of these two modules achieve unified management and scheduling about remote sensing images, vector maps, digital elevation models and three-dimensional scene data.
数字高程模型(dem)是重要的基础地理信息数据，在军事和民用领域有着重要的应用价值。
Digital elevation model (DEM) is the fundamental infrastructure of geographical information systems and has wide applications in both military and civil areas.
如何评估利控制数字高程模型建立过程中各种数据的质量，是建立各种类型数据库和地理信息系统的“瓶颈”问题。
However, how to evaluate and control the quality of all sorts of data in the course of building DEM is a bottleneck problem of establishing various type databases and GIS.
数字高程模型(dem)是地理信息系统的一种基础数据。
Digital Elevation Model (DEM) is an important type of basic data in gi s.
它克服了通常作战仿真中采用遥感影像式数字高程模拟方法，数据结构复杂，图形生成速度慢等不足。
The method surmounts some shortcomings of using Remote Sensing image Digital Elevation Model, such as the complicated data structure, the slower image formative speed and so on.
高精度数字高程模型(DEM)是水土流失规律研究与流域地形空间分析中重要的空间数据。
High accuracy DEMs is an important data in study of soil erosion and terrain feature space analysis.
本文主要对大规模地形数据(基于规则格网数字高程模型)的组织与可视化进行研究。
In this paper, study on organization and visualization of the massive terrain dataset mainly on Regular Square Grid data format are discussed.
数字高程模型(DEM)是一定区域范围内规则格网点的平面坐标及其高程的数据集或者是经、纬度和海拔高度的数据集。
DEM (Digital elevation Model) is a data set of plane coordinate or longitude, latitude, and elevation of the regular square grid points in some region.
数字高程模型(dem)是地理信息数据库的基本内核，其应用的广泛性不言而喻。
DEM is the basic kernel of data-base of geographical information, which has wide applications.
分析了DMA的DTED和USGS的DEM高程数据存储格式，比较了其异同，提出了一种高效的数字地图高程数据的存储格式并实现了存取算法。
Analyzing the storage format of DMA DTED and USGS DEM and then presenting a new digital terrain elevation data storage format. The storing and reading algorithm are also realized.
笔者提出一种基于不同时相实测数据建立交互数字高程模型研究坡面土壤沉积与搬运间的量化关系的方法，进而获得小流域坡面不同时相间的土壤侵蚀量。
Using alternant dem the study raised a new method based on the relation of sedimentation and precipitation to acquire the amount of soil erosion on hillslopes.
数据库包括地图数据、遥感影像数据、文档数据、照片数据、数字高程模型以及各类数据的元数据信息。
The remote sensing datum, map datum, photo datum, document datum, DEM, and meta-data are included in the database.
机载激光点云数据滤波是获取高精度数字表面模型和数字高程模型的关键。
Airborne lidar point cloud filtering is the key of acquiring DSM and DEM with high precision.
收集的地理实况数据包括1：5万的地形图和根据该地形图经数字化处理生成的数字高程模型(dem)。
The collected ground true data includes topography map with scale of 1:50 000 and the corresponding Digital Elevation Model (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.
过滤是LIDAR数据预处理的重要步骤，过滤的目的是把LIDAR数据分成地面点和非地面点，它是获取高精度数字高程模型的关键。
The aim of the filtering of LIDAR data set is to divide the data set into ground points and non-ground points. The filtering of LIDAR data set is a crucial step to obtain the DEM with high precision.
在建立数字高程模型时，往往会遇到海量的离散数据点，造成遍历数据点的困难。
When creating DEM, we always encounter numerous discrete data points which make ransacking all points difficult.
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.
详细介绍了数字高程模型的相关概念，数据获取和生成算法；
There are some related definition and some algorithm about how to gain and generate terrain data in the thesis.
空间数据库主要包括数字高程图、土地利用图与土壤类型图。
Using the technique of GIS, the paper analyses the climate, hydrology, soil and land uses in the study area.
空间数据库主要包括数字高程图、土地利用图与土壤类型图。
Using the technique of GIS, the paper analyses the climate, hydrology, soil and land uses in the study area.
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