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OGC Web Map Service is one kind of OGC Portrayal Services belongs to OGC Web Service model and it provides multi-platform interoperability of spatial data set. This paper presents a method for implementing OGC Web Map Service based on Web Service technique and introduces the detailed process. 相似文献
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The integration of Sensor Web Enablement services with other Open Geospatial Consortium (OGC) Web Services as Geospatial Processing Workflows (GPW) is essential for future Sensor Web application scenarios. With the help of GPW technology, distributed and heterogeneous OGC Web Services can be organized and integrated as compound Web Service applications that can direct complicated earth observation tasks. Under the Sensor Web environment, asynchronous communications between Sensor Web Services are common. We have proposed an asynchronous GPW architecture for the integration of Sensor Web Services into a Web Service Business Process Execution Language workflow technology. We designed a Sensor Information Accessing and Processing workflow, an asynchronous GPW instance, to take an experiment of observing and mapping ozone over Antarctica. Based on our results, our proposed asynchronous workflow method shows the advantages of taking environmental monitoring and mapping tasks. 相似文献
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基于HTML5、Ajax和We bService的WebGIS研究 总被引:1,自引:0,他引:1
为改变WebGIS中各种浏览器缺乏支持矢量数据的标准方法、数据互操作能力有限和空间分析功能较弱的现状,基于新一代HTML5标准、Ajax和Web Service技术,本文提出了开放式WebGIS模型,并开发了实验平台。该平台支持数据共享的Web Services和OGC新规范Web Processing Service,改善了现有WebGIS缺陷,提高了WebGIS的互操作及空间分析能力。 相似文献
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首先介绍了WCTS(网络坐标转换服务)的基本概念,接着介绍了基于W eb Service的空间数据互操作技术,重点突出了GML的优势。基于GML、W eb Service的WCTS能够实现不同CRS(坐标参照系)下空间G IS数据的共享和互操作,提高了数据共享的效率和质量。本文最后给出了以M apG IS平台为基础的基于GML、W eb Serv-ice的WCTS的体系结构和实现方法。 相似文献
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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
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基于OGC Web服务模型的城市异构GIS互操作 总被引:2,自引:0,他引:2
利用服务共享实现城市异构GIS系统互操作是解决互操作问题的一个新思路。本文首先分析了开放地理信息系统联盟(OGC Open GIS Consortium)的互操作模型(OWS Open GIS Web Service)的框架结构以及服务协作,然后以模型框架中的一个基本数据服务———地图要素服务(Web Feature Service)为例,详细介绍了利用服务共享实现城市异构GIS数据共享与互操作的具体开发过程,最后对该模式的应用前景进行了分析。 相似文献
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基于52North WPS的Web Processing Service开发方法研究 总被引:2,自引:1,他引:1
地理信息系统共享与互操作、网格计算的发展在数据获取、发布及制图服务方面取得了较大进展,而针对在线空间分析的网络分析服务(Web Processing Service,WPS)仍相对滞后,国内对于此方向研究较少.OGC于2007年发布WIPS1.0.0标准,该标准能促使网络GIS共享与互操作的极大发展,本文以WPS为重点... 相似文献
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Chuanrong Zhang Tian Zhao Weidong Li 《International Journal of Applied Earth Observation and Geoinformation》2010
Although the fast development of OGC (Open Geospatial Consortium) WFS (Web Feature Service) technologies has undoubtedly improved the sharing and synchronization of feature-level geospatial information across diverse resources, literature shows that there are still apparent limitations in the current implementation of OGC WFSs. Currently, the implementation of OGC WFSs only emphasizes syntactic data interoperability via standard interfaces and cannot resolve semantic heterogeneity problems in geospatial data sharing. To help emergency responders and disaster managers find new ways of efficiently searching for needed geospatial information at the feature level, this paper aims to propose a framework for automatic search of geospatial features using Geospatial Semantic Web technologies and natural language interfaces. We focus on two major tasks: (1) intelligent geospatial feature retrieval using Geospatial Semantic Web technologies; (2) a natural language interface to a geospatial knowledge base and web feature services over the Semantic Web. Based on the proposed framework we implemented a prototype. Results show that it is practical to directly discover desirable geospatial features from multiple semantically heterogeneous sources using Geospatial Semantic Web technologies and natural language interfaces. 相似文献
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在充分理解OpenGIS网络地图分块服务实现标准(WMTS)1.0的基础上,通过与目前开源社区和商业应用中具有相同定位的几个规范的对比,分析了WMTS所具有的技术特点。分析表明,该规范除支持常规的分块地图服务,还在多图式、多维度、坐标系统适应性以及URL个性化等方面为一些特殊应用提供了有力支持,相应其实现的难度也相对较大,需要实现人员付出更多时间来理解标准的内容。 相似文献
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《International Journal of Digital Earth》2013,6(6):449-470
Finding the right spatially aware web service in a heterogeneous distributed environment using criteria such as service type, version, time, space, and scale has become a challenge in the integration of geospatial information services. A new method for retrieving Open Geospatial Consortium (OGC) Web Service (OWS) that deals with this challenge using page crawling, link detection, service capability matching, and ontology reasoning, is described in this paper. Its major components are distributed OWS, the OWS search engine, the OWS ontology generator, the ontology-based OWS catalog service, and the ontology-based multi-protocol OWS client. Experimental results show that the execution time of this proposed method equals only 0.26 of that of Nutch's method. In addition, the precision is much higher. Moreover, this proposed method can carry out complex OWS reasoning-based queries. It is being used successfully for the Antarctica multi-protocol OWS portal of the Geo-Information Web Service Portal of the Polar. 相似文献
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本文分析了Adobe Flash技术在网络地图发布前端技术上的优势和应用现状,选择开源Flash地图组件Modest Maps作为开发工具,在其上添加了一些组件模块,以"5.12地震信息显示"为示例,实现了基于Modest Maps的Falsh网络地图发布和简单的空间分析. 相似文献
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基于XML的地理数据Web服务研究 总被引:1,自引:0,他引:1
吴张峰 《测绘与空间地理信息》2007,30(5):122-126
本文针对大部分GIS系统之间无法很好的沟通和协作而形成地理数据孤岛的问题,提出建立"基于XML的地理数据Web服务"的解决方案,解决多源的、异构的分布式地理数据之间的共享和互操作。研究Web服务的服务种类,提出元数据和地理数据相结合的服务模式。并通过建立测绘、规划、房地等方面的多个地理数据Web服务,提出调用各种地理数据Web服务构建GIS应用系统的具体应用方案。 相似文献