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Ontology-Based Descriptions for Semantic Discovery and Composition of Geoprocessing Services

机译:基于本体的语义发现和地理处理服务组合描述

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摘要

The ability to process geospatial data will be a great benefit for spatial data infrastructures. This requires the ability to compose data providing services with geoprocessing services. Discovering suitable geoprocessing services is a major challenge in this endeavour. Current (keyword-based) approaches to service discovery are inherently restricted by the ambiguities of natural language, which can lead to low precision and/or recall. To alleviate these problems, we propose to use an ontology-based approach to GI service discovery, which rests on two ideas. Ontologies describing geospatial operations are used to create descriptions of requirements and service capabilities; matches between these descriptions are identified based on function subtyping. We use a running example from the geospatial domain to analyse which problems can occur in existing keyword- and ontology-based approaches and how the discovery of geoprocessing services differs from other service discovery tasks. The example is also used for illustrating the prototypical implementation of the proposed approach.
机译:处理地理空间数据的能力对于空间数据基础架构将是巨大的好处。这要求能够将数据提供服务与地理处理服务组合在一起。寻找合适的地理处理服务是这项工作中的主要挑战。当前(基于关键字的)服务发现方法固有地受到自然语言歧义的限制,这可能导致精度降低和/或召回率下降。为了缓解这些问题,我们建议使用基于本体的方法来进行GI服务发现,该方法基于两个思想。描述地理空间操作的本体用于创建需求和服务能力的描述;这些描述之间的匹配是基于功能子类型进行识别的。我们使用一个来自地理空间域的正在运行的示例来分析现有的基于关键字和本体的方法中可能出现的问题,以及地理处理服务的发现与其他服务发现任务有何不同。该示例还用于说明所提出方法的原型实现。

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