共查询到19条相似文献,搜索用时 171 毫秒
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DLG是一种将地理要素分层存储的矢量数据集,其包含了空间信息和属性信息,利用其属性信息,将空间展布的各要素以符号化的形式表达出来,形成传统地形图以供使用者判读、应用,将会大大提升传统地形图的生产成本、成图周期,弥补传统地形图现势性差的弱点。笔者借助ArcMap平台,通过投影转换、样式符号制作及要素符号化、符号标注、制图综合及图面整饰一系列过程,详细介绍了从1∶5万DLG数据库至传统地形图的转换过程,并总结出了转换过程中的重点和难点工作,同时提出了利用mxd文件模板采用修改数据源的方法可实现同比例尺其他图幅的快速转换,提高工作效率。 相似文献
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MapGIS数据向ArcGIS数据格式转换方法的实践与探讨 总被引:1,自引:0,他引:1
由于在地图编辑和数据分析方面各具优势,MapGIS和ArcGIS逐渐发展成为目前国内被广泛使用的地理信息系统平台,实现二者间数据安全转换将有利于对两种系统功能的充分利用,大大提高空间数据库的生产效率和使用率。在分析比较两种系统空间建模思想及专有数据格式的基础上,提出了将空间数据从MapGIS平台转换到ArcGIS平台上的基本思路,并通过工作实例进行了数据转换验证,对过程中存在的问题进行了总结,形成了一套较为成熟的技术方法。 相似文献
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在基于ArcGIS模型处理1∶5000专题地理信息数据过程中,数据的批量面擦除、批量数据整合和裁切、数据属性一致性检查、数据格式转换到外业调绘平板是生产过程中遇到的主要问题,为了提高作业效率,利用ArcGIS模型构建器对专题地理数据处理程序进行了研究。本文详细介绍了主要程序的关键技术和在实际应用中取得的较好效果。 相似文献
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依据第二松花江地理信息系统测绘数据特点,采用ArcSDE技术对其进行管理较传统管理方式具明显优点.通过ArcSDE,对完全CAD要素格式和GIS要素格式测绘数据进行入库,并对其进行安全维护、库管理、数据备份与恢复.该技术的应用,将实现空间数据的集成管理和高效率的信息查询. 相似文献
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中国岩石圈三维结构数据库地理信息系统设计 总被引:6,自引:0,他引:6
数据是地理信息系统的基础,数据库的建设是地理信息系统建设的关键,也是最重要的一步。按照ArcSDE GeoDatabase模型结构进行空间数据库建模,将数据库存放在数据库服务器端,用户通过空间数据库引擎ArcSDE访问数据库,便于实现数据共享和多用户并发操作。ArcObjects是ESRI公司开发的面向对象的地理数据模型和高度集成的软件组件库,是一套完全符合COM标准的大型软件架构。在服务器端以SQL Server 2000+ArcSDE8.1为空间数据库平台,客户端的管理系统通过ArcObjects+VB6来开发设计。 相似文献
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范少冉 《地质灾害与环境保护》2009,20(3):125-128
摘要利用国际上先进的ArcGIS技术和Visual C#.NET开发平台.建立了徐州市地质环境管理信息系统。地质环境空间数据库与属性数据库的建立,将空间信息与属性信息有机联系.进一步提高地质工作的质量和效率.为相关部门及时提供图形、数据资料.更好地支持政府宏观决策。 相似文献
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二调中MapGIS数据到ArcGIS数据转换问题的研究 总被引:1,自引:0,他引:1
目前,应用比较广泛的两种地理信息系统软件MapGIS软件和ArcGIS软件,都各自占有很大的地理信息市场.但它们的各自都拥有自己的数据格式.一直以来地矿部门所采用GIS软件基本上是MapGIS软件,随着ArcGIS软件在我国各领域应用逐渐广泛,这就需要我们将目前拥有的大量MapGIS格式的GIS数据转换成ArcGIS数据.因此在资源有效利用驱使下,迫切需要实现这两种数据格式的共享.本文深入讨论了实现GIS软件之间数据格式转换的各种方法,并描述了由MapGIS格式数据转换为ArcGIS格式数据的详细过程.通过转换过程分析这种转换模式存在的问题,并提出解决问题的方法. 相似文献
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Developing a Geological Management Information System: National Important Mining Zone Database 总被引:1,自引:0,他引:1
INTRODUCTIONGeographic information systems (GIS) is a newtechnology of storing and processing spatial informa-tion , which can combine graphics with many types ofdatabase .It can also exhibit accurate and real spaceinformation with charts and texts according to actualneed ,and canintegrate geographic locations and cor-related data attributes as an organic whole .Geoscien-tists have shown GIS to be a very useful tool in theanalysis of geoscience problems (Zhao et al .,2004 ;Singer ,1993… 相似文献
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以我国矿业权实地核查数据为例,讨论AutoCAD、MapGIS、ArcGIS3种数据格式转换软件集成开发设计思路,详细剖析数据格式的特点,对建立三者间空间结构、属性、渲染关系的特性分析研究,提出其空间数据跨平台无损转换的整体解决技术方案,开发系统可实现自动批量无损转换,支持统一标准化图件模板定制。 相似文献
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基于ArcSDE C API的ArcSDE客户端实现方法 总被引:2,自引:0,他引:2
为了灵活的访问ArcSDE管理的空间数据,可以利用ArcSDE提供的C API函数开发自己需要的客户端。这里介绍了ArcSDE组织空间数据的原理,讨论了利用ArcSDE提供的C API函数来自定义ArcSDE客户端的实现过程,并给出了用ArcSDE提供的C API函数存取空间数据的方法。将本方法应用到国产优秀W ebGIS软件GeoBeans中,取得了良好的效果。 相似文献
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文章利用AreGIS软件、数字地形分析和GIS空间分析技术,研究了桂西-滇东南地区DEM模型、数字地形特征及锰矿床矿点空间分布,揭示地形地貌特征与锰矿分布的空间关系.文章基于DEM对桂西-滇东南地区的地形因子进行提取和分析,并与锰矿床矿点的空间分布进行对比分析,推断出该地区有利于锰矿床产出分布的数字地形特征.分析结果表明,该地区锰矿分布于坡度小、起伏度小、切割微弱地带,这些地带有利于锰矿物的次生氧化富集. 相似文献
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Hassan Ahmadi Arun Das Mehdi Pourtaheri Chooghi Bairam Komaki Houshang Khairy 《Natural Hazards》2014,72(2):711-722
The accurate delineation of area plays a key role in the surveying of land change detection and the classification of land covers. In a hydrologic system, the watershed delineation and the detection of the boundaries among watershed is a basic method for performing spatial analyses. After recent advances in image processing and raster-based spatial analysis in geographic information systems, and being easily accessible data via various sources especially through remote sensing, the reliable determination of topographical boundaries possible is possible. Therefore, an integrated approach of data analysis and modeling can accomplish the task of delineation. The main aim in this research is to evaluate the delineation method of watershed boundary using four different digital elevation models (DEM) including advanced spaceborne thermal emission and reflection radiometer (ASTER), Shuttle Radar Topographic Mission (SRTM), digital topography, and topographic maps. In order to determine a true reference of boundary of watershed, sample data were also obtained by field survey and using global positioning system (GPS). The comparison reference points and the results of these data showed the average distance difference between reference boundary, and the result of ASTER data was 43 m. However, the average distance between GPS reference and the other data was high; the difference between the reference data and SRTM was 307 m, and for digital topographic map, it was 269 m. The average distance between topographic map and the GPS points differed 304 m as well. For the statistical analysis of comparison, the coordinates of 230 points were determined; the paired comparisons were also performed to measure the coefficient of determination, R 2, as well as analysis of variance in SPSS software. As a result, the R 2 values for the ASTER data with the digital topography and topographic map were 0.0157 and 0.171, respectively. The results showed that there were statistically significant differences in distances among the four means of the selected models. Therefore, considering other three methods, the ASTER DEM is the most suitable applicable data to delineate the borders of watersheds, especially in rugged terrains. In addition, the calculated flow directions of stream based on ASTER are close to natural tributaries as well as real positions of streams. 相似文献
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数字高程模型在地表过程研究中的应用 总被引:23,自引:0,他引:23
数字高程模型(DEM)是人们研究地表过程、构造地貌的一种行之有效的方法和手段。DEM是地形表面的数字表达,易于三维可视化和统计分析。DEM作为一种空间数据,可以进行各种空间分析,编制平均高程图、山顶面图、谷地面图、局部地形图、平均坡度图和剖面图,从而有效地显示地形特征,预测地表侵蚀量和地形发展趋势。特定盆地充填面的DEM分析是探讨特定地质时期(新生代)以来地表由沉积转入侵蚀、沉积之后隆升过程、隆升速率和剥蚀量、剥蚀速率等地表过程的有效手段,它与大地构造、深部地球物理相结合,可以揭示隆升机制和大陆动力学背景。低起伏侵蚀面的DEM分析有利于定量揭示山脉夷平面分布,结合基岩地质等其他资料综合分析,可揭示侵蚀面的成因,揭示大地构造与地表过程相互关系是未来研究的主要目标之一。 相似文献
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JiangWenping XiDaping 《中国地质大学学报(英文版)》2003,14(4):374-380
With the development of computer graphics, the three-dimensional (3D) visualization brings new technological revolution to the traditional cartography. Therefore, the topographic 3D-map emerges to adapt to this technological revolution, and the applications of topographic 3D-map are spread rapidly to other relevant fields due to its incomparable advantage. The researches on digital map and the construction of map database offer strong technical support and abundant data source for this new technology, so the research and development of topographic 3D-map will receive greater concern. The basic data of the topographic 3D-map are rooted mainly in digital map and its basic model is derived from digital elevation model (DEM) and 3D-models of other DEM-based geographic features. In view of the potential enormous data and the complexity of geographic features, the dynamic representation of geographic information becomes the focus of the research of topographic 3D-map and also the prerequisite condition of 3D query and analysis. In addition to the equipment of hardware that are restraining, to a certain extent, the 3D representation, the data organization structure of geographic information will be the core problem of research on 3D-map. Level of detail (LOD). space partitioning, dynamic object loading (DOL) and object culling are core technologies of the dynamic 3D representation. The objectselection, attribute-query and model-editing are important functions and interaction tools for users with 3D-maps provided by topographic 3D-map system, all of which are based on the data structure of the 3D-model. This paper discusses the basic theories, concepts and cardinal principles of topographic 3I)-map,expounds the basic way to organize the scene hierarchy of topographic 3D-map based on the node mechanism and studies the dynamic representation technologies of topographic 3D-map based on LOD, space partitioning, DOL and object culling. Moreover. such interactive operation functions are explored, in this paper, as spatial query, scene editing and management of topographic 3D-map. Finally, this paper describes briefly the applications of topographic 3D-map in its related fields. 相似文献