共查询到19条相似文献，搜索用时 647 毫秒
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浅谈OpenGL在地学3维可视化中的应用 总被引：1，自引：0，他引：1
3维地形模型无论是在直观的视觉感受还是在空间分析等方面都是2维地学模型所无法比拟的。DEM是建立地学3维可视化的主要内容,也是3维地理信息系统GIS的主要研究内容之一。本文所实现的程序是在VC 6.0平台基础上,基于DEM数据,利用OpenGL提供的相关功能函数,达到地学3维可视化的目的,同时利用纹理映射技术为3维模型贴纹理建立真实感强的3维环境。 相似文献
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利用AO扩展ArcGIS中建筑物3维可视化功能 总被引：1，自引：1，他引：0
在城市3维GIS研究、城市建筑物3维可视化背景下,基于COM接口,利用AO在VB环境下开发了一个可以在ArcGIS中自动生成建筑物3D屋顶(房屋)和纹理的DLL,加强了ArcGIS的建筑物3维可视化功能。 相似文献
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虚拟现实（VR）与地理信息系统（GIS）是近几年来测绘领域的研究热 点，3维地理信息系统（3D－GIS）则是两者的应用结合。文中在前人研究成果的基础上，对基于数字社区的3维可视化查询的有关技术进行了探索，同时介绍了数字社区3维可视化查询系统的总体设计思想、系统结构以及功能特点。 相似文献
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结合2维GIS的空间分析功能和3维GIS成熟的可视化技术,提出一个基于VREagle组件的二三维联动方式的GIS系统体系结构,实现了在数据层面和可视化层面上的系统二三维联动操作。通过某港区的应用系统项目开发中的实践证明,此体系结构能够为GIS系统提供逼真的3维交互界面,并辅助GIS空间分析功能的3维可视化效果。 相似文献
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提出一种基于GIS的简单、快速和直观的3维地质建模及可视化方法。利用ArcGIS的VBA语言编写钻孔数据提取程序生成钻孔3维模型;通过空间插值工具生成地层的TIN表面模型,并基于矢量化工具获取的断裂线生成断层的3维表面模型,从而组合成地质构造的结构模型。此外,利用C#语言基于SceneControl组件开发了3维地质可视化系统原型,并对构建的地质结构模型进行了展示。系列实验结果表明,该方法具有操作简单、可视化效果好和系统开发周期短的特点,在地学研究、工程应用和其他相关领域具有一定的推广应用价值。 相似文献
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云计算是一种新型的分布式计算模式,也是当前IT界研究热点。云GIS平台提供了一种稳定、高效、低成本、环保的支撑应用架构,可以构建各种基于Web的弹性的、按需的地理信息服务,必将成为下一代GIS服务平台。本文在分析了国内外云GIS平台发展现状的基础上,研究了涉及云GIS平台构建的基础设施虚拟化、地理数据云存储、GIS自动化部署等关键技术,从而为相关云GIS平台建设提供一定的指导与借鉴。 相似文献
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基于XML和CORBA的网络虚拟GIS设计 总被引：4，自引：1，他引：4
虚拟GIS是随着计算机图形技术和人机接口技术的发展，在传统多维GIS系统基础上发展起来的新型GIS系统。虚拟GIS在扩展GIS应用领域的同时，也给GIS设计带来了新的问题。根据当前计算机技术的新发展，特别是在网络信息表达技术和网络平台技术的最新发展，来设计面向Web的网络虚拟GIS。结合XML技术来解决网络虚拟GIS中多种信息在网络空间中的表达和传输，结合CORBA技术来设计网络虚拟GIS的网络结构。通过与这些新技术的结合，为开发有着丰富功能，完全开放的网络虚拟GIS建立了新的途径。 相似文献
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时会省 《测绘与空间地理信息》2005,28(2):58-60
近年来,随着计算机技术、图形学理论、遥感技术、摄影测量技术及其相关技术的飞速发展,以2维方式处理3维空间数据已不能满足实际应用的需求。目前,利用成熟的2维或2、5维的空间数据处理技术,结合已有数据生成3维数据是当前解决3维GIS可视化技术问题的基础之一,因此,测绘成果的4D产品在3维GIS可视化中得到广泛应用。本文对4D产品在3维地表地形显示、数字城市3维虚拟等方面的应用及相关技术作以介绍。 相似文献
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Integrating Web-based GIS and image processing tools for environmental monitoring and natural resource management 总被引：1，自引：1，他引：0
The combined powers of Web-based geographic information systems (GIS) and on-line remote sensing tools can significantly reduce the high cost and labor associated with environmental monitoring and natural resource management. This paper introduces an integrated Web-based GIS architecture by combining three levels of geographic information services (GIServices): data archive, information display, and spatial analysis. A prototype Web site, WGAT (Web-based GIS and Analytic Tools), has been developed to provide easy access of geospatial information and to facilitate Web-based image analysis and change detection capabilities for natural resource managers and regional park rangers. The Web-based integration framework emphasizes user-oriented services, distributed network environments, metadata standards, communication protocols, client/server computation, and ubiquitous access.This paper forms a portion of the Integrated Mobile GIS and Wireless Image Web Services for Environmental Monitoring and Management project supported by NASAs Affiliated Research Center (ARC) at San Diego State University. Funding by the NASA ARC program and matching funds from the San Diego State University Foundation are acknowledged and greatly appreciated. The author wishes to thank John Kaiser, the ARC program coordinator, and Dr. Douglas Stow, the ARC program Principle Investigator, for their coordination efforts on this project. Java programming was provided by Liang Guo, a geography graduate student at San Diego State University. 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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