我们从高程控制点中提取高程数据，利用规则矩形网格模型实现了三维地貌的显示。
We drew out the elevation data from elevation control points, and made use of the regular square grid to display three-dimensional terrain.
以水准点高程数据变化说明地面沉降历史现状。
Historical actuality of ground settlement is explained Using changes of benchmark height data.
论述了从地形图中提取等高线、对等高线矢量化以及通过矢量数据生成高程数据的实现方法。
In this paper, the methods of drawing contour line from terrain map, the vector of contour line and generating elevation data from vector data are discussed.
针对高程数据，给出一种规则化插补的重采样方法和基于着陆区平面拟合的粗糙度与坡度提取算法。
For elevation data, a regularized interpolation for resampling and an algorithm for extracting terrain roughness and slope with landing area plane fitting are presented.
由于利用雷达技术获取地面高程数据技术本身的限制，SRTM原始dem数据中存在着很多问题。
Because of the limitations on using Radar technology to obtain surface elevation data, there are many problems in the original SRTM DEM data.
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.
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.
地形图中包含了大量的高程信息，是DEM数据的重要的来源。
The topographic map contains a large amount of elevation information, and is an important source of DEM data.
通过矢量化提取等高线和高程点作为基础数据，构建三维地形。
Contour lines and elevation points are obtained by vectorization as basic data, which can be used to build three-dimension terrain.
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.
本文介绍了沧源县三等GPS网的概况、布网方案、数据处理方法，讲述了GPS高程拟合在该网的实际运用。
The establishment of 3rd GPS network of Cangyuan county is introduced, such as network planning, data processing method and actual application of height fitting.
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.
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).
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.
采用寻乌县气象站及其附近7个气象站点的气象资料和地理数据，建立区划指标的高程推算模型。
In the paper, elevation calculation models of division indexes were set up depending on the climatic and geographic data from 7 neighboring weather stations of Xunwu county.
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.
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.
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.
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.
利用高精度GPS后处理软件GAMIT/GLOBK对厦门集美跨海大桥B级GPS控制网的实测数据进行处理，分析海潮对GPS控制网的影响，指出海潮改正对近海短时间GPS观测高程方向的影响可达数厘米。
By using the after-treatment software GAMIT/GLOBK of high precision GPS, it treats with the observational data of class-B GPS control network for the Xiamen Jimei cross-sea bridge.
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.
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.
从数据诊断原理出发，研究了对拟合模型参数作显著性数据判据，据此建立高程异常模型。
In this paper, judgements of markedness of fitting model parameters are studied and elevation abnormality models are built on the basis of the principle of data diagnoses.
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.
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.
采用网格索引来组织地形数据，利用反距离高程加权平均值算法，提取TIN地形的特征点。
Terrain data is organized by grid, the article adopts height weighted average algorithm of elevation based on grid network, to extract feature point of TIN terrain.
在胶南市应用GPS建立三等平面控制网及高程拟合作业过程中，所采用的数据处理方法提高了平面精度和高程拟合精度。
During the period of establishing third grade plane controlling net and elevation fitting work by using GPS, plane precision and elevation fitting precision are promoted.
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.
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