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《制图学和地理信息科学》2013,40(4):249-258
Emerging web-based mapping technologies use the World Wide Web (WWW) and Internet protocols to provide the ability to distribute, access, and visualize geospatial information over the Internet. Many web-based mapping applications have been developed to deliver geospatial information within and across organizations and even to the public at large. A major technological challenge is to achieve interoperability amongst web-based mapping applications so that mapping and geoprocessing resources distributed over the Internet can be shared and integrated. This paper presents an approach to the development of web-based mapping applications using distributed object technology in order to enable interoperability. Distributed object technology combines object technology, which utilizes reusable software components (called objects) that model real-world entities to build software systems, and distributed computing, which allows computing resources to be distributed and accessed over computer networks. The paper introduces a distributed object technology, the Common Object Request Broker Architecture (CORBA); proposes an architecture for web-based mapping using CORBA; and presents a prototype implementation. 相似文献
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针对潮汐传播呈线性变化,水域如何实现高密度实时水位的获取问题,详细阐述了技术实现需要的资源及涉及的关键技术与数学模型。运用实例介绍了在珠江口航道水域如何获取高密度实时水位的主要技术设计内容,并对设计获取的潮位精度进行了数据验证,结果表明中误差控制在7cm以内。最后对水域高密度实时水位及其获取技术的应用前景进行了展望。 相似文献
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主要介绍了一套录井现场数据WEB显示系统的设计与开发及其实现的目标和意义。该系统是在建立起录井资料中心数据库的前提下开发完成的。系统采用.net技术开发,利用了数据库、WEB服务、WEB网页、浏览器四层体系结构。该系统满足油田各单位实时在线查看录井资料的迫切需求,使得甲方可真正实现专家零距离的技术支持和监督,可减少上井次数、缩短建井周期、提高技术决策速度。 相似文献
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Current Progresses in Study of Impacts of the Tibetan Plateau on Asian Summer Climate 总被引:2,自引:1,他引:2
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The current progresses in the study of impacts of the Tibetan Plateau on Asian summer climate in the last decade are reviewed. By analyzing evolution of the transitional zone between westerly to the north and easterly to the south (WEB), it is shown that due to the strong heating over the Tibetan Plateau in spring, the overturning in the prevailing wind direction from easterly in winter to westerly in summer occurs firstly over the eastern Bay of Bengal (BOB), accompanied with vigorous convective precipitation to its east. The area between eastern BOB and western Indo-China Peninsula thus becomes the area with the earliest onset of Asian monsoon, which may be referred as BOB monsoon in short. It is shown that the summertime circulations triggered by the thermal forcing of the Iranian Plateau and the Tibetan Plateau are embedded in phase with the continental-scale circulation forced by the diabatic heating over the Eurasian Continent. As a result, the East Asian summer monsoon is intensified and the drought climate over the western and central Asian areas is enhanced. Together with perturbations triggered by the Tibetan Plateau, the above scenarios and the associated heating have important influences on the climate patterns over Asia. Furthermore, the characteristics of the Tibetan mode of the summertime South Asian high are compared with those of Iranian mode. Results demonstrate that corresponding to each of the bimodality of the South Asian high, the rainfall anomaly distributions over Asia exhibit different patterns. 相似文献
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基于JAVA WEB START技术的网络GIS应用 总被引:1,自引:0,他引:1
首先分析了目前网络GIS的服务器和客户端技术,在说明各种技术优缺点的同时,提出一种基于SUN公司JAVAWebStart的富客户端技术的GIS应用模式,并结合县(市)级土地利用数据库标准(试行)建立的GIS系统说明这种应用的效果。 相似文献
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基于WEB技术的项目管理平台设计 总被引:5,自引:5,他引:0
为了方便科研人员进行项目申报,提高工作效率,充分利用局域网的有利资源,提出了建立项目管理平台的设计思路和技术方案。 相似文献
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