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DUJie CHENXiaoyong FumioYamazaki 《地球空间信息科学学报》2003,6(3):37-42
This paper demonstrates an experiment on the generation of 3D virtual geographic environment on the basis of experimental flight laser scan-ning data by a set of algorithms and methods that were developed to auto-matically interpret range images for extracting geo-spatial features and then to reconstruct geo-objects. The algorithms and methods for the inter-pretation and modeling of laser scanner data include triangulated-irregular-net- work (TIN)-based range image inter- polation; mathematical-morphology (MM)-based range image filtering,feature extraction and range image segmentation, feature generalization and optimization, 3D objects recon-struction and modeling; computer-graphics (CG)-based visualization and animation of geographic virtual reality environment. 相似文献
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Shen Dayong Lin Hui Gong Jianhua Zhao Yibin Fang Zhaobao Guo Zhongyang 《地球空间信息科学学报》2013,16(2):113-116
On the basis of previous work, this paper designs an intelligent agent based on virtual geographic environment (VGE) system that is characterized by huge data, rapid computation, multi-user, multi-thread and intelligence and issues challenges to traditional GIS models and algorithms. The new advances in software and hardware technology lay a reliable basis for system design, development and application. 相似文献
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On the basis of previous work, this paper designs an intelligent agent based on virtual geographic environment (VGE) system that is characterized by huge data, rapid computation, multi-user, multi-thread and intelligence and issues challenges to traditional GIS models and algorithms. The new advances in software and hardware technology lay a reliable basis for system design, development and application. 相似文献
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XU Bingli LIN Hui GONG Jianhua 《地球空间信息科学学报》2006,9(2):127-134
IntroductionDVGE was first proposed by Lin Hui and GongJianhua in 1999. DVGE“is not only an advanceddevelopment of geographic information science, butalso a distributed three dimensions virtual environ-ment. It is based on avatar and has many charac-ters… 相似文献
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作为新一代地理分析工具,虚拟地理环境对于增强人类地理认知、分析解决地理问题方面具有显著优势。目前虚拟地理环境的基本框架、实现技术均有较多论述与成果。但在虚拟地理环境的认知研究方面尚缺乏有效指导。为提高虚拟地理环境构建的科学性,本文通过对虚拟地理环境现有概念的分析,提出从系统论角度进行虚拟地理环境认知研究的观点;并对虚拟地理环境的认知与地理认知、地图认知等相近概念进行了对比分析。从现实环境与虚拟环境间的相似性入手建立了虚拟地理环境的认知研究框架,该框架从思维相似、感觉相似、几何相似、特性相似和离散相似5个方面探讨了虚拟地理环境认知研究目前的着眼点,并将思维相似作为虚拟地理环境认知研究的重点与难点。该框架将虚拟地理环境的认知问题置于一个更广泛背景中进行研究,一方面体现了虚拟地理环境所具有的地理实验研究新平台的作用,另一方面重点强调了人的作用,对深入开展虚拟地理环境的研究具有重要意义。 相似文献
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Dynamic flood disaster simulation is an emerging and promising technology significantly useful in urban planning, risk assessment, and integrated decision support systems. It is still an important issue to integrate the large assets such as dynamic observational data, numerical flood simulation models, geographic information technologies, and computing resources into a unified framework. For the intended end user, it is also a holistic solution to create computer interpretable representations and gain insightful understanding of the dynamic disaster processes, the complex impacts, and interactions of disaster factors. In particular, it is still difficult to access and join harmonized data, processing algorithms, and models that are provided by different environmental information infrastructures. In this paper, we demonstrate a virtual geographic environments-based integrated environmental simulation framework for flood disaster management based on the notion of interlinked resources, which is capable of automated accumulating and manipulating of sensor data, creating dynamic geo-analysis and three-dimensional visualizations of ongoing geo-process, and updating the contents of simulation models representing the real environment. The prototype system is evaluated by applying it as a proof of concept to integrate in situ weather observations, numerical weather and flood disaster simulation models, visualization, and analysis of the real time flood event. Case applications indicate that the developed framework can be adopted for use by decision-makers for short-term planning and control since the resulting simulation and visualization are completely based on the latest status of environment. 相似文献
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虚拟地理环境认知与表达研究初步 总被引:4,自引:0,他引:4
分析了地理学的地理环境与当前地理信息技术中的地理空间两者概念之间的差异,探讨了地图与地理信息系统空间认知的发展及特点,初步研究了虚拟地理环境认知与表达的对象、特征与主要内容。从基于虚拟地理环境的地理认知和基于地理认知的虚拟地理环境表达两个层面分析了虚拟地理环境的认知与表达;指出虚拟地理环境的认知与表达研究不仅需要进一步发展地理空间认知理论和方法,还需要拓展对地理过程及人类行为的认知与表达理论和方法研究;并着重探讨了地理过程的表达和人类行为的模拟,指出当前虚拟地理环境认知与表达研究的关键内容。 相似文献
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智慧城市是数字城市的升级版,其管理服务的动态实现与虚拟地理环境联系紧密。本文首先综述了虚拟地理环境的概况;然后对虚拟地理环境运用在智慧城市中的关键技术作了归纳,分析了三维动态仿真、虚实交互、多智能体、数字孪生技术的特点及其在智慧城市管理中的适用范围;进而从应用的角度分析了虚拟地理环境在智慧城市中的研究现状与存在的挑战;最后总结出在人工智能和VR新时代下,虚拟地理环境在智慧城市中实时显示、高效算法、虚实交互等方面的发展前景。 相似文献
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Integrating the theory of distributed virtual geographic enviroments (DVGE) and high level architecture(HLA), the architecture of DVGE based on HLA is designed. The data flow and the object models of the architecture are also discussed. The architecture basically meets the need of DVGE in real-time communication, distribution, collaboration, reusing and interoperation, expansion, and standard. 相似文献
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基于VRS的交通事故现场三维激光扫描系统研究 总被引:1,自引:0,他引:1
在介绍了传统交通事故现场勘测手段的缺陷及现有三维激光扫描系统的不足和弱点之后,给出了一种基于VRS的交通事故现场勘测三维激光扫描系统,介绍了该系统的工作原理,给出了其涉及的核心技术。该系统在交通事故现场勘测,G IS数据采集、移动测绘等领域均具有巨大应用潜力。 相似文献
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