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首页> 外文期刊>International Journal of Geographical Information Science >An SVG-based method to support spatial analysis in XML/GML/SVG-based WebGIS
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An SVG-based method to support spatial analysis in XML/GML/SVG-based WebGIS

机译:在基于XML / GML / SVG的WebGIS中支持空间分析的基于SVG的方法

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XML/GML/SVG-based approaches are promising for building Web-based geographic information systems (WebGIS). However, current XML/GML/SVG-based WebGISs are lacking in spatial analysis. Some of them are designed for web mapping only. Others adopt a server-side solution for spatial analysis, which suffers from the 'bottleneck' problem and results in a high network transmission load. Load-balancing spatial analysis between server side and browser side can be used to solve the above problems. This article focuses on one of the key building blocks of load-balancing spatial analysis, that is, SVG-based spatial analysis which enables spatial querying and analysis directly on SVG (on the browser side). After analyzing the workflow of spatial analysis, we identify and focus on two key issues in providing spatial analysis on SVG: SVG-based spatial information representation and SVG-based spatial extended structured query language (SSESQL). For the first issue, a theoretical foundation is set up to develop an SVG-based spatial information representation model. Some spatial operators are designed and integrated into an SSESQL to support spatial querying on SVG. Finally, we design and implement two case studies. The results of these case studies show that the proposed method is feasible and operable in supporting spatial analysis directly on SVG on the browser side. The proposed method can be easily incorporated with some existing methods (e.g., GML-based spatial analysis on the server side) to provide load-balancing spatial analysis (load balancing between server side and browser side) in XML/GML/ SVG-based WebGIS. As a result, users can access high-performance spatial analysis simply via a web browser (such as Internet Explorer and Firefox).
机译:基于XML / GML / SVG的方法有望用于构建基于Web的地理信息系统(WebGIS)。但是,当前的基于XML / GML / SVG的WebGIS缺乏空间分析。其中一些仅用于Web映射。其他人则采用服务器端解决方案进行空间分析,这会遇到“瓶颈”问题,并导致网络传输负载过大。服务器端和浏览器端之间的负载平衡空间分析可以用来解决上述问题。本文重点介绍负载平衡空间分析的关键构建块之一,即基于SVG的空间分析,它可以直接在SVG(在浏览器端)上进行空间查询和分析。在分析了空间分析的工作流程之后,我们确定并集中在提供SVG空间分析的两个关键问题上:基于SVG的空间信息表示和基于SVG的空间扩展结构化查询语言(SSESQL)。对于第一个问题,为开发基于SVG的空间信息表示模型建立了理论基础。设计了一些空间运算符并将其集成到SSESQL中,以支持SVG上的空间查询。最后,我们设计并实施了两个案例研究。这些案例研究的结果表明,该方法在浏览器端直接在SVG上支持空间分析是可行且可操作的。所提出的方法可以很容易地与一些现有方法(例如,服务器端基于GML的空间分析)结合在一起,以在基于XML / GML / SVG的WebGIS中提供负载均衡的空间分析(服务器端和浏览器端之间的负载均衡)。 。结果,用户可以仅通过Web浏览器(例如Internet Explorer和Firefox)访问高性能的空间分析。

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