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.
高程数据就是很好的单级光栅数据的例子，它经常用颜色坡度，如图2所示。
Elevation data is a good example of a single-band raster dataset, often visualized with a color ramp, as shown in Figure 2.
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.
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.
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.
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.
这点记忆提高程度，看起来也许并不算很多，但是这是多年以来大量研究数据而得到的平均值，而且记忆测试时候采用的大多是一些生僻难记的词汇，所以这些已经算是已知的可以大幅提高记忆的良方了。
That might not sound much, but it is an average over many studies and often for things that are hard to remember.
然而，对于那些具有较高程度的数据同步流量的系统，捕获的失败事件的数量可能会达到一个很高的水平。
However, for systems with high levels of data synchronization throughput, the number of captured failed events can potentially reach high levels.
整个数据集的箱线图显示了有很大程度的外泄，较高程度的分散度，以及数据集内大量的异常值。
The boxplot of the entire dataset showed there was significant right skew, a high level of dispersion and sizable quantity of outliers within our dataset.
它可以让您轻而易举把现有的IMS数据转换成xml，以促进与业务过程的集成，提高程序员的工作效率，减少开发先导时间。
It lets you easily convert existing IMS data to XML, to facilitate integration with business processes, improve programmer productivity, and reduce development lead times.
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.
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.
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.
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.
进一步，若将其与常用的GPS数据处理软件相结合，可使后者在提供平面控制的同时，也能提供一定等级的高程控制。
Furthermore, when combined with general GPS data-processing software, it can provide some degree of vertical control additionally to the latter's horizontal control.
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.
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.
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.
在高程转换系统中首先对输入的数据进行粗差探测，剔除可能存在粗差的观测数据，从而提高拟合结果的可靠性。
In the elevation conversion system, at first detected the gross errors of inputting data and then removed it, enhanced the reliability of the fitting results.
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.
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.
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.
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.
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