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Using Distributed Semantic Catalogs for Information Discovery on Spatial Data Infrastructures
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Author(s): Fabio Gomes de Andrade (Federal Institute of Education, Science and Technology of Paraiba, Brazil), Fábio Luiz Leite (Paraiba State University, Brazil)and Cláudio de Souza Baptista (Federal University of Campina Grande, Brazil)
Copyright: 2011
Pages: 21
Source title:
Geospatial Web Services: Advances in Information Interoperability
Source Author(s)/Editor(s): Peisheng Zhao (George Mason University, USA)and Liping Di (George Mason University, USA)
DOI: 10.4018/978-1-60960-192-8.ch006
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Abstract
Spatial data sharing among both private and public organizations is an old issue. Spatial Data Infrastructures (SDIs) have been proposed to solve data integration and discovery problems. Nonetheless, they can only partially work out these problems, as most of their catalog services are built on keyword based search. This approach always results in low precision on searching results. One of the greatest challenges in spatial integration is to provide the semantics for underlying data and services. This chapter describes a distributed catalog service that uses ontologies to describe underlying information so as to improve searching precision. The proposed catalog service can rewrite and propagate queries to other distributed catalogs to cooperate and exchange information directly without the traditional problems imposed by a centralized architecture.
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