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Integrating Spatial Data Linkage and Analysis Services in a Geoportal for China Urban Research

机译:在中国城市研究的地理门户中集成空间数据链接和分析服务

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摘要

Many geoportals are now evolving into online analytical environments, where large amounts of data and various analysis methods are integrated. These spatiotemporal data are often distributed in different databases and exist in heterogeneous forms, even when they refer to the same geospatial entities. Besides, existing open standards lack sufficient expression of the attribute semantics. Client applications or other services thus have to deal with unrelated preprocessing tasks, such as data transformation and attribute annotation, leading to potential inconsistencies. Furthermore, to build informative interfaces that guide users to quickly understand the analysis methods, an analysis service needs to explicitly model the method parameters, which are often interrelated and have rich auxiliary information. This work presents the design of the spatial data linkage and analysis services in a geoportal for China urban research. The spatial data linkage service aggregates multisource heterogeneous data into linked layers with flexible attribute mapping, providing client applications and services with a unified access as if querying a big table. The spatial analysis service incorporates parameter hierarchy and grouping by extending the standard WPS service, and data-dependent validation in computation components. This platform can help researchers efficiently explore and analyze spatiotemporal data online.
机译:现在,许多地理门户网站都在发展成在线分析环境,其中集成了大量数据和各种分析方法。这些时空数据通常分布在不同的数据库中,并且以异构形式存在,即使它们引用的是同一地理空间实体。此外,现有的开放标准缺乏属性语义的充分表达。因此,客户端应用程序或其他服务必须处理不相关的预处理任务,例如数据转换和属性注释,从而导致潜在的不一致。此外,为了构建指导用户快速了解分析方法的信息界面,分析服务需要显式地建模方法参数,这些参数通常是相互关联的,并且具有丰富的辅助信息。这项工作提出了针对中国城市研究的地理门户中的空间数据链接和分析服务的设计。空间数据链接服务通过灵活的属性映射将多源异构数据聚合到链接的层中,从而为客户端应用程序和服务提供了统一的访问权限,就像查询大表一样。空间分析服务通过扩展标准WPS服务以及在计算组件中依赖于数据的验证来整合参数层次结构和分组。该平台可以帮助研究人员有效地在线探索和分析时空数据。

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