共查询到19条相似文献，搜索用时 78 毫秒
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城市空间二维信息系统与三维虚拟场景一体化研究与应用——BDA城市三维信息系统的设计与实现 总被引：5，自引：0，他引：5
利用二维平面地图来表示多维世界,是人类认识世界改造世界发展史上产生的一次伟大的飞跃。现阶段二维地理信息系统和三维虚拟现实系统各自具有优缺点,将二者结合解决各自的不足之处,即可实现二维地理信息系统的宏观性、整体性和三维虚拟场景系统的现实性、直观性等的优势互补,克服二维地理信息系统的符号抽象性和三维虚拟现实漫游时的“迷失”。在北京经济技术开发区的城市三维信息系统建设中有效实现了二者的集成与应用。 相似文献
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基于Vega的三维虚拟城市地理信息系统的实现 总被引：1，自引：0，他引：1
Vega在三维虚拟模拟建模中应用广泛、功能强大稳定,但对于各种地理信息管理查询等功能薄弱;MapX在地理信息系统开发中得到了广泛的应用,它具有地图数据逻辑查询等强大的地理信息功能。在对Vega、MapX、Aecess数据库三者数据的连接关系、图层控制、逻辑查询、路径导航等核心部分阐述基础上,利用Vega三维仿真软件,结合地理信息系统开发组件MapX和管理附属信息的数据库,在VC“平台下构建了虚拟三维地理信息系统,有效地解决了独立的二维电子地图和独立的三维虚拟场景的各自不足之处。 相似文献
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虚拟现实技术使传统二维的、静态的地图表示向三维的、动态的场景表示方向发展,传统的二维符号视觉变量已不适应三维虚拟战场环境的需要。本文结合三维虚拟环境的特点,提出了一套基本适应三维虚拟战场环境的三维符号视觉变量。 相似文献
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网络二维地图与三维虚拟场景集成探讨 总被引：2，自引：2，他引：0
文章以网络二维地图和三维虚拟场景集成为主要线索,从常用空间数据三维模型建模方法出发,探讨了集成的总体思路。并从系统的角度讨论了网络环境下二三维集成的体系结构及集成后各模块之间的通信方法。在实例研究部分,设计并实现了一个二三维集成的原型系统。最后对网络二维地图与三维虚拟场景集成进行了展望。 相似文献
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随着GIS应用的深入,人们越来越多地要求在真三维空间中处理问题,怎样将地图中的二维场景转换为视觉上逼真的三维立体空间是三维虚拟技术的关键所在。三维GIS为立体空间信息的展示提供了更加丰富、逼真的平台,使人们将抽象难懂的空间信息进行可视化和直观化。小范围的二维地图的三维可视化景观格局的构建为三维场景的虚拟化提供了底层支持。其中,数字校园的三维可视化建模就是三维地理信息的一个重要分支。本文以辽宁工程技术大学北校区为研究区域,利用3DS MAX对校园的建筑及基础设施进行三维场景建模,以ArcGIS为平台支撑,最终实现了校园景观格局的三维可视化,拓展了属性实时查询及实时实地视觉体验等功能,实现了真正意义上的三维可视化虚拟校园。虚拟化数字校园的构建,可以提高学校知名度,也为学校的后期规划和管理提供了直观的模拟,具有十分重要的潜在价值。 相似文献
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二维地图和三维场景集成是当前GIS的一种重要应用方式,本文在研究分析平面地图和三维场景联动特点的基础上,提出了高精度二三维联动算法的要点,推导了根据平面地图参数定位三维场景及其反过程的计算公式,并根据数字高程模型对算法结果进行修正,对算法的定位精度进行了分析。实验结果表明,算法具有很高的定位精度和稳定性。 相似文献
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GIS中三维模型的设计 总被引：46，自引：4，他引：46
研究了三维GIS中的空间信息传输模式 ,探讨了平面地图符号与三维模型的区别与联系 ,阐述了三维模型的确立、定位、简化描述和逻辑性设计 相似文献
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《制图学和地理信息科学》2013,40(3):140-153
A hybrid system that integrates two-dimensional (2D) GIS and three-dimensional (3D) visualization has been developed to provide unique solutions to application domains where traditional 2D GIS and 3D visualization cannot alone provide a solution. In this paper, we focus on three key issues in realizing such an integrated system, including large-scale terrain rendering, 2D and 3D combination display (for example, rendering 2D GIS layers in 3D space), expanding traditional 2D GIS analysis functions into a 3D environment, and visualizing 3D geographical data. A generic framework is developed to integrate 3D visualization with various types of 2D GIS, such as commercial GIS software, open source GIS software and spatial databases. A prototype 2D and 3D hybrid system that seamlessly integrates 2D GIS (developed with ArcEngine) and 3D rendering engine (developed with DirectX) is then developed based on the framework. In this hybrid system, 2D and 3D data are viewed within the same scene. Multiple 2D GIS layers are overlaid on the base terrain using a Level of Detail (LOD) model. Advanced query functions, data accessing, data management and spatial analysis, which are executed in the traditional 2D GIS, are provided to users in a 3D environment by continuously transforming information between the 2D GIS subsystem and the 3D subsystem. The 3D data are organized and displayed by Keyhole Markup Language (KML) and textured 3D models in the COLLAborative Design Activity (COLLADA) format. The prototype demonstrates that this hybrid system has effectively addressed the three key issues identified above and that it can seamlessly integrate 2D GIS and 3D visualization. The hybrid system has great potential to be employed in many application domains, such as urban planning, landscape design and environmental decision making, among others, to enhance the 3D design capability and facilitate public participation in the planning, design and decision-making process. 相似文献
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《The Cartographic journal》2013,50(3):240-246
AbstractThe use of computer-generated perspective views, often named as three-dimensional (3D) maps, is growing. These terrain visualisations should be more understandable for users without cartographic education, which are not familiar with contour lines. Within the study, two eye-tracking experiments and online questionnaire were used for investigating the difference between user cognition of classical two-dimensional (2D) visualisation with contour lines and perspective 3D view. Questionnaire was focused on maps understandability, suitability and aesthetics. Results of the questionnaire shows, that the majority of participants prefer 3D visualisation. First eye-tracking experiment was designed as a pair of maps in one stimulus. One shows 2D visualisation, the other 3D visualisation. No significant differences between user preferences of 2D and 3D visualisation were found, but the results were influenced with the order of the maps in the stimuli. Because of that another experiment was designed. In this case stimuli contained only one of two possible visualisations (2D and 3D). ScanPath comparison of this experiment results confirmed that users have different strategies for cognition of 2D and 3D visualisation, although statistically significant difference between both types of visualisation was found in the ScanPath length metric only. 相似文献
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