基于OGC标准的地理信息服务语义标注研究

Research on Geographic Information Services Semantic Annotation Based on OGC

地理信息服务数量的剧增使服务发现、集成和使用变得愈加困难,用户也难以获取真正所需要的目标数据。如何自动、快速、准确地发现所需的地理信息数据服务,成为地理信息服务语义检索研究中亟需解决的问题之一。然而,目前大部分地理信息服务查询还主要是基于关键字匹配的检索,语义歧义或语义缺失则会导致用户无法获取其真正所需的目标服务。文中基于OGC标准建立了OGC网络服务能力描述文件的语义标注方法及其流程,并设计开发了基于语义标注的OGC地理信息服务语义搜索原型系统。通过验证表明,文中语义标注方式可提高OGC地理信息服务检索的查准率和查全率。

As geographic information services increase dramatically,it makes more difficult to discover, integrate and utilize them for users. Also, users cannot obtain the objective data really needed. So, how to get the necessary GIS data service automatically,quickly and accurately is a challenge which needs to be solved urgently in geographic information semantic search field. However,much more service search is still based on the keyword matching. Semantic ambiguity and semantic deficiency bring out that users cannot get the really needed service. In this paper, the semantic annotation method and workflow of OGC （Open Geospatial Consortium） Web Service （OWS） capability files is generated, and a prototype system based on semantic annotation is designed and developed. It is verified that semantic annotation method can enhance the precision ratio and recall ratio of OWS discovery.