Recent topographic data are useful for identification of fault activity.
现代地形资料可资鉴定断层活动性。
The design and development of the topographic data extraction information system based on non-metric digital imagery.
基于非量测数码影像的地形数据采集信息系统设计与开发。
Topographic data are critical to global changes in climate, land formations, atmospheric changes, and research in soil and water loss.
地形数据对于我们了解全球气候变化、土地构成、大气变化，开展区域水土流失研究非常重要。
In reality, in order to get more convenient data organization for drawing, LOD model is to use theory of algorithms to reform intrinsic grid topographic data base.
所谓的LOD建模，其实质就是采用一定的算法思想将原有的网格地形数据进行重组，得到一种更加便于实时绘制使用的数据结构。
As the generalization of topographic data, thematic data generalization needs the support of generalization knowledge to satisfy the use requirements and reflect the main geographic nature.
与地形数据综合一样，专题数据综合需要依据一定的综合规则来保障数据综合围绕应用的需求、反映主要地理特征。
Nowadays the most common used methods for extracting small range topographic data are the total-station-based ground surveying and the photography-theodolite-based terrestrial photogrammetry.
目前常用的小范围地形数据采集方法主要有基于全站仪的地面测量方法和基于摄影经纬仪的地面摄影测量方法。
Topographic shading is based on the GTOPO 30 elevation dataset compiled by the U.S. Geological Survey’s EROS Data Center.
地形渲染使用的数据来自GTOPO30elevation dataset，该数据由美国地质调查局的EROS数据中心采集和提供。
Data quality controlling is a important index for topographic digital map.
数据质量控制是良好的数字地形图质量的重要保证。
Firstly, the request of vector map data is summarized, such as color-setting standard, attribute definition of topographic feature, etc.
首先对入库的矢量图形数据要求做了概述，如要素的分层设色标准、地形图要素属性项定义等；
In the study of the method for extracting topographic patterns based on Grid data, the author introduces the terrain profile analysis method and the falling water simulations method.
在研究基于规则格网数据地形特征提取过程中，本人先后介绍了断面极值法和流水模拟法。
In this paper, the topographic effects on CSAMT apparent resistivity data in Qin Imperial Mausoleum's archeological exploration are described, with a comparison of different correction methods.
介绍了秦皇陵考古探测CSAMT视电阻率数据中的地形影响和采用不同校正方法进行校正的对比研究结果。
Topographic model, deposit solid model, rock and fault solid model are built based on the study on data permutation and vectorization of original modeling data of Tongchang Copper Mine.
在对铜厂铜矿原始建模资料进行了数据转换、矢量化等研究工作的基础上，建立了整个矿山的地表模型、矿床实体模型、岩层及断层实体模型。
In construction of hydroelectric project, small range DTM data are often needed for topographic surveying, mapping, excavated form detection, earthwork calculation and so on.
水利水电工程施工过程中常常需要获得一些小范围的DTM数据，用于地形测绘、开挖形态监测及工程土石方量计算等。
In the study of the method for extracting topographic patterns based on Grid data, including the terrain profile analysis method and the falling water simulations method.
在研究基于规则格网数据地形特征提取过程中，主要有断面极值法和流水模拟法。
The topographic correction of the electric sounding data by the boundary element method for anomalous potential is discussed, and the significance effect is obtained.
求解异常电位的边界单元法对电测深资料进行地形改正，应用效果明显。
By using 1:500 topographic map updating 1:2000 topographic through generalization of automatic cartography, decrease the burden of UBGIS data revision.
通过地图自动缩编利用1：50 0地形图更新1：20 00地形图，减少城市基础地理信息系统的更新负担。
Beginning with the nature and character of map symbols, it classifies coastal zone topographic map symbols and data according to the actual application.
从地图符号的本质和特征入手，根据具体应用把海岸带地形图符号进行分类和数据分层。
To implement topographic map digitalization by means of MAPGIS is one of main means of getting spatial geographic information data, and that digitalization could bring out diversified sorts of errors.
利用MAPGIS实现地形图数字化是获取空间地理信息数据的主要手段之一，而图形数字化过程中会产生各种类型的误差。
So far as 3D gravity and magnetic survey is concerned, the data acquisition, topographic correction and 3D forward and inversion methods are gradually practical;
对于重磁力三维勘探而言，数据采集、地形改正和三维正反演法已逐步走向实用；
The topographic map contains a large amount of elevation information, and is an important source of DEM 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。
Total station topographic mapping method Total station mapping of the work process are: data collection, data processing, graphics editing and graphics output.
全站仪的地形图测绘方法全站仪测图的工作过程主要有：数据采集、数据处理、图形编辑和图形输出。
The river channel change, the bed load and bed material armoring, and the water level lowering after the operation of the Gezhouba project are analyzed based on the topographic and hydrologic data.
根据实测地形和水文泥沙资料，分析了葛洲坝枢纽运用后宜昌河段的河床冲淤变化、推移质和床沙的粗化以及枯水位的变化。
First, we must strengthen the construction of geographic information data sources, using 3 to 4 years time to achieve full coverage of the basic topographic maps.
一是要加强地理信息数据资源建设，利用3至4年时间实现基本地形图全覆盖。
This paper discussed in detail algorithm of geometric rectification by scanned topographic map based on teaching model with least squares method to heighten image quality and data accuracy.
针对扫描矢量化这一数据采集手段，以提高图像质量、数据精度为目的，以教学模型为基础，利用最小二乘原理，详细讨论了扫描后的地形图几何纠正算法。
The observed data within the Gaoquan Catchment demonstrate a nonlinear response of runoff production and soil erosion to different degrees of topographic slopes under cropland conditions.
高泉沟的观测数据还表明，不同坡度的农田产生的径流和侵蚀是非线性的。
In this paper, it is discussed how to design topographic map intelligent generalization system, based on cartographic data bank.
本文论述了在地图数据库的基础上如何进行地形图智能综合系统的设计。
The topographic map scanning digitization is an important acquisition method for GIS data, which has become the mainstream of the map digitization.
地形图扫描数字化为GIS数据源的一种重要获取手段，已经成为地图数字化的主流。
To gain the 3d digital topographic results mainly involves three aspects such as the data source, the processing mode and the production procedure.
获取数字三维地形成果主要涉及数据源、采集模式和生产流程个方面。
To gain the 3d digital topographic results mainly involves three aspects such as the data source, the processing mode and the production procedure.
获取数字三维地形成果主要涉及数据源、采集模式和生产流程个方面。
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