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Building Web-Based Spatial Information Solutions around Open Specifications and Open Source Software 总被引：9，自引：0，他引：9
Geographic Information Systems (GIS) are moving from isolated, standalone, monolithic, proprietary systems working in a client‐server architecture to smaller web‐based applications and components offering specific geo‐processing functionality and transparently exchanging data among them. Interoperability is at the core of this new web services model. Compliance with Open Specifications (OS) enables interoperability. Web‐GIS software's high costs, complexity and special requirements have prevented many organizations from deploying their data and geo‐processing capabilities over the World Wide Web. There are no‐cost Open Source Software (OSS) alternatives to proprietary software for operating systems, web servers, and Relational Database Management Systems. We tested the potential of the combined use of OS and OSS to create web‐based spatial information solutions. We present in detail the steps taken in creating a prototype system to support land use planning in Mexico with web‐based geo‐processing capabilities currently not present in commercial web‐GIS products. We show that the process is straightforward and accessible to a broad audience of geographic information scientists and developers. We conclude that OS and OSS allow the development of web‐based spatial information solutions that are low‐cost, simple to implement, compatible with existing information technology infrastructure, and have the potential of interoperating with other systems and applications in the future. 相似文献
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随着空间信息技术和网络技术的发展,地理信息系统（GIS）也在不断地从2维世界走向3维世界,从GIS应用走向GIS服务。在此基础上,本文提出了3DGIS Web服务,并设计了基于SOA的3DGIS Web服务多层体系结构、3DGIS Web服务的数据源和API框架,论述了3DGIS Web服务和现有的2维GIS Web服务集成需要解决的关键技术问题。 相似文献
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《制图学和地理信息科学》2013,40(3):153-165
With the progress of mobile GIS technology there is a great potential for adopting wireless communications and Internet mapping services for regional environmental management programs and natural habitat conservation. This paper provides an overview of a NASA-funded research project that focuses on the development of mobile GIS tools and wireless Internet Map Server (IMS) services to facilitate environmental monitoring and management tasks. By developing and testing wireless web-based map/image servers, mobile GIS applications, and global positional systems (GPS), this research created an integrated software/hardware infrastructure for a prototype mobile GIS application. The mobile GIS prototype allows multiple resource managers and park rangers to access large-size, remotely sensed images and GIS layers from a portable web server mounted in a vehicle. Users can conduct real-time spatial data updates and/or submit changes back to the web server over the wireless local area network (WLAN). This paper discusses in general the major components of mobile GIS, their current technological limitations, and potential problems during implementation. Key research agenda for mobile GIS are identified with suggestions for future research and development. 相似文献
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GIS系统因其与生俱来的空间属性,正面临着数据密集、计算密集、高并发、海量时空数据运算等挑战.云计算具有资源池化、弹性伸缩、按需使用等优势,可实现更高性能、更高并发的应用,从而协助解决GIS面临的问题.本文提出了基于云端一体化技术体系的GIS系统架构,包括集约化的GIS云、多样化的GIS端,以及云端互联的GIS系统三个部分.集约化的GIS云平台集成了高性能跨平台、智能集群、并行切图、并行空间分析等技术,可集约利用云计算资源,并提供高效的GIS服务.多样化的GIS端集成桌面、Web移动端技术,可构建跨多端设备的GIS应用.云端互联的一体化系统通过云端一体化、云端协同技术,实现云端之间高效互联、协同工作的GIS应用模式.云端一体化GIS系统致力于让GIS充分利用云计算的优势,应对大数据时代的数据密级、计算密集等挑战. 相似文献
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《International Journal of Digital Earth》2013,6(3):175-193
The hypermap concept was introduced in 1992 as a way to hyperlink geospatial features to text, multimedia or other geospatial features. Since then, the concept has been used in several applications, although it has been found to have some limitations. On the other hand, Spatial Data Infrastructures (SDIs) adopt diverse and heterogeneous service oriented architectures (SOAs). They are developed by different standard bodies and are generally disconnected from mass market web solutions. This work expands the hypermap concept to overcome its limitations and harmonise it with geospatial resource oriented architecture (ROA), connecting it to the semantic web and generalising it to the World Wide Hypermap (WWH) as a tool for building a single ‘Digital Earth’. Global identifiers, dynamic links, link purposes and resource management capabilities are introduced as a solution that orchestrates data, metadata and data access services in a homogeneous way. This is achieved by providing a set of rules using the current Internet paradigm formalised in the REpresentational State Transfer (REST) architecture and combining it with existing Open Geospatial Consortium (OGC) and International Organization for Standardization (ISO) standards. A reference implementation is also presented and the strategies needed to implement the WWH, which mainly consist in a set of additions to current Geographic Information System (GIS) products and a RESTful server that mediates between the Internet and the local GIS applications. 相似文献
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Monsak Socharoentum 《制图学和地理信息科学》2013,40(1):33-43
Web Mapping APIs (WMAs), such as Google Maps API, are widely used by researchers across different fields to develop geospatial Web applications. Among maps and map functionalities provided through WMAs, route and direction are prominent and commonly available. Given that each WMA uses a different map database and a different set of assumptions, the routes they generate, for the same pairs of origin and destination addresses, are different. Considering the current void in literature on WMAs and the routes they generate, in this paper, select common WMAs are compared and analyzed based on their routing techniques. The results of these comparisons will benefit researchers by helping them better understand the behavior of WMAs in producing routes, which in turn can be used for selecting suitable WMAs for research projects or developing applications (such as navigation and location-based services). The process in which routes are evaluated can also be used as a guideline to help researchers explore behavior of WMAs in generating routes. 相似文献
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随着互联网络的迅速发展与逐步成熟,涌现出一大批提供各种网络服务、产品说明、技术支持和进行学术交流与教学的地理信息系统网站,文章概述了我国地理信息系统网站的发展,对GIS网站类型与功能进行了归纳,提供了国内具有较大影响的GIS热点网站。并在此基础上,对发展中存在的问题与解决方案提出了建议。 相似文献
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为了提高WebGIS响应效率,满足用户对高交互性和炫酷界面的需求,提出采用RIA（丰富互联网应用程序）技术改善WebGIS传统结构模式存在的问题,介绍各种RIA技术并对比总结其优缺点,详细分析新兴的微软Silverlight技术特点,针对应用系统功能需求,利用Silverlight技术在ArcGISServer10平台上设计并实现基于RIA的成都市工业经济GIS系统,验证Silverlight在WebGIS富客户端的可行性。 相似文献
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分析了地理信息系统产生和发展的背景、地理信息系统软件体系结构和开发模式的发展变化,并基于开放的思想提出地理信息系统将向以网络服务和网格服务为主要形式的开放式GIS方向发展,以实现地理信息的共享与空间数据互操作以及信息资源共享与协同解决问题。 相似文献
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Kevin M. Curtin Gabriela Voicu Matthew T. Rice Anthony Stefanidis 《Transactions in GIS》2014,18(2):286-301
The Traveling Salesman Problem is one of the most prominent problems in combinatorial optimization, and is regularly employed in a wide variety of applications. The objective of this article is to demonstrate the extent of sub‐optimality produced by Traveling Salesman solution procedures implemented in the context of Geographic Information Systems and to discuss the consequences that such solutions have for practice. Toward that end, an analysis is made of Traveling Salesman solutions from implementations in four Geographic Information System packages. These implementations are tested against the optimal solution for a range of problem sizes. Computational results are presented in the context of a school bus routing application. This analysis concludes that no Traveling Salesman implementation in GIS is likely to find the optimal solution when problems exceed 10 stops. In contrast, optimal solutions can be generated with desktop linear programming software for up to 25 cities. Moreover, one GIS implementation consistently found solutions that were closer to optimal than its competitors. This research strongly suggests that for applications with fewer than 25 stops, the use of an optimal solution procedure is advised, and that GIS implementations can benefit from the integration of more robust optimization techniques. 相似文献
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Sea ice data has significant scientific value for climate, environmental impact and engineering studies leading to the construction of facilities in Arctic waters, as well as to support tourism and fishing planning. Large collections of such data are acquired, compiled, produced and maintained by national and international agencies such as the Canadian Ice Service (CIS). Some of these data collections have been made available online. However, current Internet‐based sea ice data dissemination practices do not foster easy access to and use of the data, especially given the amount of the archived sea ice data and the nature of their spatial changes and high temporal variations. This article reports a research effort in developing a web‐based geographical information system (GIS) that facilitates the access and use of the historical sea ice data. The system provides online access, exploration, visualization, and analysis of the archived data, mostly in the form of ice charts, within a web‐based GIS. The results from a prototype development indicate that web GIS, developed using Rich Internet Application (RIA) technologies, provides added values in serving sea ice data and suggests that such a system can better accommodate more advanced sea ice data access and analysis tools. 相似文献
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YEN Gar-onZHAO ShuangmingGONG JianyaZHU Xinyan 《地球空间信息科学学报》2001,4(4):32-36
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Abstract Remote sensing and geographic information system (GIS) scientists and educators in general are utilizing global web sources for information of the latest developments in the use of satellite and GIS approaches, as well as to understand more fully environmental and natural resources processes in various geographic settings. West Virginia University (WVU) has embarked on a pioneering approach (as only the second university worldwide) to archive graduate theses and dissertations in electronic format with worldwide web access. This study illustrates the type of remote sensing and GIS research available through WVU's worldwide web ETD archive, and its potential uses by educators at a variety of levels of the education system for understanding remote sensing and GIS methodologies, as well as environmental and natural resource processes. Keywords: Geographic Information Systems (GIS), remote sensing, West Virginia University, Electronic Thesis and Dissertation (ETD). 相似文献
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当前的理信息系统(Geographic Information System,GIS)数据应用体系框架在数据更新、数据与需求一致性、数据质量保证等方面存在不少实际问题,在分析上述问题的基础上,探讨了具体的解决方法,构建了完整的GIS数据应用体系框架,为GIS工程建设和运行提供了理论依据和更具操作性的实践经验. 相似文献
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微服务架构围绕具体的业务领域组件可创建多个应用,这些应用可以独立开发、部署、管理和加速.在分散的组件中使用微服务和云平台架构,使部署、管理和服务功能交付变得更加简单.本文基于主流公有云平台和Docker容器,以微服务架构和SuperMap云GIS平台技术为框架,构建了企业级在线GIS公有云开发平台Su-perMap Online.该平台在线提供构建GIS Web应用所需的资源,包括Web Apps、GIS数据、开发APIs以及GIS云主机等.其中,GIS云主机内置了GIS服务器软件、许可,不需要安装、部署,在线购买就可以获取完整的GIS服务器. 相似文献