共查询到20条相似文献,搜索用时 62 毫秒
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数码城市GIS之虚拟旅游 总被引:1,自引:0,他引:1
本文从数码城市GIS入手,介绍了当前比较流行的虚拟旅游。首先,介绍了虚拟旅游的定义和特点,然后介绍了虚拟旅游的类型和国内虚拟旅游网站的发展现状,在此基础上,最后提出了虚拟旅游的发展展望。 相似文献
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Cell-Portal技术在数码城市GIS室内场景管理中的应用 总被引:1,自引:0,他引:1
借鉴游戏中的方法,提出了基于Cell—Portal的室内模型管理与调度策略,从而实现了数码城市GIS室内、外场景的一体调度策略和场景管理。试验证明,该方法不会增加数据生产中的工作量,适应数码城市GIS深入发展的需要。 相似文献
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结合我院为太原供电局所做的输电线路管理信息系统,探索如何结合最新的“3S”技术(GIS、GPS、RS),应用110000资料,更好的为供电企业提供优质的服务。 相似文献
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首先阐述日照分析的基本模型,然后着重讨论几种基于数码城市GIS的常用日照分析内容及方法,最后对基于数码城市GIS的日照分析软件Sunlight作简要介绍。 相似文献
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共建城市综合功能GIS数据库可以避免重复建设,缩短建设周期,有利于地理信息资源的有序管理,有益于地理信息产业技术的发展。本文阐述了共建数据库设计原则及过程,在分析用户层次和用户需求的基础上,对数据库的开发设计进行了探讨,包括概念化设计和详细设计。最后,提出了城市综合功能GIS数据库共建方案。 相似文献
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本文就GIS产业的新动向,讨论万维网分布式GIS的技术实现中的整体框架模式。GIS随着因特网的发展已趋地一种开放式结构。在这种开放式结构下,一些新的技术。如:空间数据仓库技术,数据集成技术,数据发布技术和数据访问技术等。本文在上述各方面均进行了讨论,提出了一个完整的思路。 相似文献
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基于GIS技术的城市基本图数据库建设的几个问题 总被引:1,自引:0,他引:1
基于GIS技术的城市基本图数据库建设的几个问题北京市测绘设计研究院刘志清随着GIS技术在城市规划、管理各部门应用的不断增加,对城市基本图数据需求也在迅速增长。数据问题已成为制约城市各类计算机管理系统建立与应用的瓶颈问题。如何为这数字地形图用户提供满意... 相似文献
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数码城市GIS中建筑物室外与室内三维一体化表示与漫游 总被引:7,自引:2,他引:7
介绍了数码城市中室外与室内场景的数据管理及可视化等关键技术,对室外与室内场景进行了综合比较,讨论了室内外场景一体化的表示思想。 相似文献
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In order to understand the 3D landscape with many high buildings in a city, the 2D GIS has to be extended to 3D GIS. The further
development of CyberCity has to include various applications of 3D scenes from the outdoor scenes to the indoor ones. In thispaper,
some key techniques, such as data management method and dynamicalvisualization method for the outdoor and the indoor scenes,
are discussed. The indoor scene is compared with the outdoor one. The idea of integratedrepresentation of the outdoor and
the indoor scenes in CyberCity GIS is discussed.
Funded by the open research fund program of LIESMARS (No. 010302). 相似文献
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From 2D to 3D GIS for CyberCity 总被引:1,自引:2,他引:1
LIDeren ZHUQing LIUQiang XUPeng 《地球空间信息科学学报》2004,7(1):1-5
In order to understand the 3D landscape with many high buildings in a city, the 2D GIS has to be extended to 3D GIS. The further development of CyberCity has to include various applications of 3D scenes from the outdoor scenes to the indoor ones. In thispaper, some key techniques, such as data management method and dynamicalvisualization method for the outdoor and the indoor scenes, are discussed. The indoor scene is compared with the outdoor one. The idea of integratedrepresentation of the outdoor and the indoor scenes in CyberCity GIS is discussed. 相似文献
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首次系统全面地介绍了有关数码城市 (CyberCity)的概念、技术支撑和典型应用 ,并结合CCGIS软件的研究开发及其在深圳和上海两个城市的示范应用 ,讨论了建设数码城市所面临的若干关键技术问题 相似文献
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GeoStar is the registered trademark of GIS software made by WTUSM in China. By means of the GeoStar, multi-scale images, DEMs, graphics and attributes integrated in very large seamless databases can be created, and the multi-dimensional dynamic visualization and information extraction are also available. This paper describes the fundamental characteristics of such huge integrated databases, for instance, the data models, database structures and the spatial index strategies. At last, the typical applications of GeoStar for a few pilot projects like the Shanghai CyberCity and the Guangdong provincial spatial data infrastructure (SDI) are illustrated and several concluding remarks are stressed. 相似文献
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GeoStar is the registered trademark of GIS software made by WTUSM in China.By means of the GeoStar,multi-scale images,DEMs,graphics and attributes integrated in very large seamless databases can be created,and the multi-dimensional dynamic visualization and information extraction are also available.This paper describes the fundamental characteristics of such huge integrated databases,for instance,the data models,database structures and the spatial index strategies.At last,the typical applications of GeoStar for a few pilot projects like the Shanghai CyberCity and the Guangdong provincial spatial data infrastructure (SDI) are illustrated and several concluding remarks are stressed. 相似文献
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ZHUQing HUANGDuo YAOXuefeng ZHANGYeting 《地球空间信息科学学报》2003,6(4):39-43
An Oracle8i-based approach is proposed to manage the integrated databases of large CyberCity. This approach consists of threeschemes: ① a special R -tree index is designed to accelerate spatial retrieving, in which the bounding boxes of local regions have no intersection and all leaf nodes of the R -tree (geometry records ) have no repetitiont;② different data compression algorithms are adopted to compress the digital elevation models, 3D vector models and images, such as LZ77 lossless compression algorithm for compression of vector data and JPEG compression algorithms for texture images;③ in order to communicate with Oracle8i database, a CyberCity GIS spatial database engine (SDE) is designed. On the basis of this SDE prototype a case study is done. 相似文献
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一种高效的三维GIS数据库引擎设计与实现 总被引:4,自引:1,他引:4
针对大规模三维城市建模与数据库协同应用,设计实现了一种高效的三维GIS数据库引擎,支持基于Oracle 11g的多模式数据库管理;提出了顾及语义的三维空间数据库模型,为地上下室内外三维空间数据的一体化组织管理奠定了基础。介绍了该引擎涉及的多层次三维空间索引、多级缓存、多线程调度以及异步通信传输等关键技术,并用武汉市三维城市模型数据进行了试验分析,验证了该引擎的有效性和可靠性。 相似文献