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1.
提出了空间信息原子服务的概念,阐述了其互操作模型与互操作层次结构,进而提出了空间信息原子服务的集成框架,包括服务分类框架、服务链接模式以及由空间信息原子服务、分子服务、流程服务和方案服务组成的服务集成模型。空间信息原子服务概念的提出,对于空间信息服务(GIService)的服务组织与管理、服务集成以及更好地实现软件复用和空间信息互操作等都具有重要的意义。  相似文献   

2.
Abstract

After the set-up of a spatial data infrastructure (SDI) and a national information infrastructure (NII) in many countries, the provision of geo-services became one of the most important and attractive tasks. With the integration of global positioning system (GPS), geographic information system (GIS) and remote sensing (RS), we can, in principle, answer any geo-spatial related question: when and where what object has which changes? An intelligent geo-service agent could provide end-users with the most necessary information in the shortest time and at the lowest cost. Unfortunately there is still a long way to go to achieve such goals. The central component in such geo-services is the integration of the spatial information system with a computing grid via wire- and wireless communication networks. This paper will mainly discuss the grid technology and its integration with spatial information technology, expounding potential problems and possible resolutions. A novel categorising of information grids in the context of geo-spatial information is proposed: generalised and specialised spatial information grids.  相似文献   

3.
地理信息服务网格及其技术构架的探讨   总被引:2,自引:0,他引:2  
通过对网格技术、W eb服务技术和地理信息服务的技术特性的分析,探讨网格技术和W eb服务技术相结合的地理信息服务技术的构架和实现方法。  相似文献   

4.
Geo-information solutions can achieve a higher level of quality if they are developed in accordance with a user-centred design that requires definition of the user requirements in the first step of solution construction. We treat a geo-information solution as a system designed to support human-based activities in a specific context through which solutions to contextual problems can be achieved via geographic knowledge. Geographic knowledge is a result of geo-data exploration, analysis, interpretation and dissemination with a given geo-information system. Taking the characteristics of geo-information systems into account, existing methods and techniques of requirements engineering may be applied for the design and implementation of geo-information solutions. Based on these considerations, here we present a generic framework that can aid geo-information experts, geo-informaticians and cartographers in the design and construction of more efficient, effective and satisfactory solutions.  相似文献   

5.
移动测量技术及其应用   总被引:22,自引:3,他引:19  
从地理空间信息服务的关键技术与要求入手,论述了地理空间数据在地理空间信息服务的作用。在对地理空间数据采集与更新技术的分析基础上,提出了基于移动测量技术的地理空间信息服务数据采集与更新的技术途径,结合LD2000-RM移动测量系统,对其应用的领域和方向进行了介绍,最后对移动测量技术在地理空间信息服务的前景进行了展望。  相似文献   

6.
7.
针对地理信息服务质量与普通Web服务质量的差异,将QoS引入地理信息服务领域,并进行合适扩展,建立通用QoGIS模型。利用此模型以及不同用户的需求提出地理信息服务选择的实现过程。最后通过实验验证模型的有效性。  相似文献   

8.
WebGL在线动态地图服务框架设计   总被引:3,自引:1,他引:2  
针对在线动态地图的交互性强、制图过程灵活、数据复杂多样、受众面广等特点及优势,本文基于WebGL技术设计了一种在线动态地图服务架构。该架构通过设计面向海量矢量数据的在线地图数据模型,定义在线地图切片的存储结构,并充分利用计算机硬件加速能力,实现了海量矢量切片数据的快速可视化和动态更新。为检验方法的可行性,利用该框架研发了某县的“多规合一”地理信息服务平台,结果表明,该框架提升了在线动态地图平台的实用性和操作性,为在线动态地图服务提供了可靠的理论和技术支撑。  相似文献   

9.
IntroductionGreat progress of scientific and technologicalcivilization dramatically i mproves the interactivemethods between people and world. At the sameti me various intelligent mobile terminals spreadInternet over anywhere in human’s life . Mobilecomputing and mobility of computational toolswill reform traditional geographic informationservice model ,combine seamlessly people ,real-ity and digital world through networks each oth-er ,achieve interoperability without li mitation ofti me and …  相似文献   

10.
曾兴国 《测绘科学》2012,37(5):194-196
城市空间基础信息平台中的空间信息服务存在语义不一致、服务集成困难等问题,使得平台的空间信息共享出现瓶颈。针对这一问题,本文提出一种基于领域本体的网格化城市信息共享模型,在平台技术架构之上,建立具有本体语义的空间信息网格,从面向具体应用的角度描述空间信息服务,消除平台空间信息服务之间语义的不一致,网格化管理平台的空间数据与软件服务资源。实验表明,该模型有助于更好地实现平台的地理信息服务与共享。  相似文献   

11.
Service oriented architectures (SOA) are widely used nowadays. As the name implies such architectures rely on services. Germany developed a marine‐specific service oriented data infrastructure (MDI‐DE – Marine Dateninfrastruktur Deutschland) from 2010 to 2013. The services in MDI‐DE can contribute to fulfilling reporting commitments for various European and national legislation. The services of MDI‐DE (just like other services affected, for instance, by INSPIRE) have to meet specific requirements regarding performance, availability and conformity (quality of service, QoS). Although SOA is an important field in scientific research there are very few publications and studies available on QoS, especially regarding INSPIRE requirements. The services of MDI‐DE were analyzed using various existing tools. Their usefulness to reflect where either the aspect's performance, availability or conformity needs improvement was partly verified. Due to varying results and the neglect of some services for various reasons it can be stated that the more tools are used, the more conclusive the outcome. Furthermore, service quality was not coherent when measured with different tools. This means that measuring QoS in terms of INSPIRE will be very difficult to do in the future and there is the danger that people will choose the tools with which their services perform best.  相似文献   

12.
以地理信息公共服务平台的公众服务为出发点,针对公众出行的实际问题,设计了以纯关系结构表达并兼顾图形表达的公交数据模型,在此基础上实现了以换乘次数最少为主要目标的公交换乘算法,并封装形成基于OGC服务接口规范的公交换乘服务,通过公共服务平台提供服务。  相似文献   

13.
Geo-information (GI) service automated composition according to user demands is a crucial task in spatial data infrastructures. State-of-the-art GI service composition approaches face serious limitations in terms of effectiveness and stability as the general GI processing service chain (GIPSC) must be generated from individual user specifications from scratch. This paper presents a novel approach called an adaptive geo-information service evolution (AgiSE) method which overcomes these limitations by adaptively reusing and modifying previously generated GIPSC. In this method, an influence domain minimisation (IDM) criterion is employed to modify the existing GIPSC to fit the new (changed) user demands through minimum revisions. The correction of local modification is ensured by process and integrity constraints. An innovative algorithm called influence domain pursuit is developed to find the optimised solution through a heuristic backward search based on the defined IDM. Experimental analysis shows the significant improvements of using AgiSE in GI services compared with existing traditional methods. The benefits of AgiSE are the improved efficiency of GI service composition and the improved executing stability of GIPSC which were achieved by reducing the service provider load. The AgiSE presented in this paper is crucial in reusing a general unified framework for GI service composition.  相似文献   

14.
基础地理数据具有空间载体和知识存量两大作用。以往人们主要关注其空间载体作用,研发和提供了丰富多样的基础地理数据服务与信息服务,但对其知识存量挖掘不够,提供的地理空间知识服务极少。近年来,“数据海量,信息爆炸,知识难求”现象愈加突出,从地理数据信息服务走向知识服务势在必行,已成为测绘科技转型升级的一项重要任务。借鉴知识图谱的最新研究进展,讨论了基础地理数据、信息和知识的基本内涵,提出了以结构化和关联化为重要特征的基础地理知识服务总体思路,分析了由此带来的4方面问题;继而从领域知识体系构建、关键技术、应用服务3个方面讨论了基础地理知识服务的研究方向与重点;以GlobeLand30知识服务为例,介绍了初步研究进展。  相似文献   

15.
陈媛媛  翟亮 《测绘科学》2007,32(2):78-80
随着地理信息技术以及计算机制图学的迅速发展,地学信息图谱理论也在不断的发展和完善,本文通过研究三维动态地学信息图谱系统,探索如何把三维动态可视化技术应用到地学信息图谱中,并且从理论、系统框架和实现方法等方面进行研究。  相似文献   

16.
实现地理信息资源共享的重要途径是建设地理信息公共服务平台,其中,保障体系建设是平台长效运行的核心。结合重庆市地理信息公共服务平台的建设和推广情况,从平台运行的保障体系各方面提出了保障体系长效运行的一套策略和做法。  相似文献   

17.
为用标准的方法提供地理处理功能,最近经OGC核准的Web处理服务(WPS)定义了通用的接口。Web服务通常能被组成服务链,用以执行更复杂的任务。本文给出创建WPS过程链工具的一种简单的方法。根据我们的ServiceChain XML模式,仅通过创建一个XML文件,不用接触任何源代码,WPS原子功能就能被集成到更广泛的工作流程中。通过在城市灾害管理应用中的实现,这种方法已得到了验证。我们的方法使任何GIS用户能很容易地提供新的复合过程。  相似文献   

18.
在研究分析党中央国务院和政府有关部门关于政府购买服务相关政策的基础上,从购买主体、承接主体以及业务范围等内容出发,分析了测绘地理信息领域政府购买服务的实际情况,并结合全面深化改革的要求和事业转型升级的需要,提出了进一步加强测绘地理信息领域政府购买服务的具体建议。  相似文献   

19.
利用地学信息图谱的江西省生态服务价值结构研究   总被引:1,自引:0,他引:1  
提出了生态服务价值结构的概念,并引入地学信息图谱,以江西省为研究区,利用HJ卫星数据,获得了江西省各县的土地利用类型面积;以修正的生态服务价值估算方法,计算得到了各县6种不同土地利用类型的生态服务价值;利用Weaver组合指数,对江西省县域生态服务价值进行类型划分;将生态服务价值类型与地学信息图谱相结合,使江西省生态服务价值谱系化,依此分析了江西省生态服务价值图谱结构类型特征与组合类型特征,为区域生态环境的可持续发展和构建低碳江西提供了参考建议,为生态经济研究提供了参考。  相似文献   

20.
首先详细讨论了目前主要的地理信息共享和互操作技术,包括Web Service,OGC的WMS/WFS,Map API,以及数据查询服务,分析了它们的特点及应用情况.并以此为基础,提出了基于Web Service服务的地理数据集服务框架,GIS数据以服务的形式在框架内发布,将各种服务集成是该框架下的主要开发模式.  相似文献   

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