DCbot: finding spatial information on the web

Authors:
Mihály Jakob;Matthias Grossmann;Daniela Nicklas;Bernhard Mitschang
Affiliations:
Institute of Parallel and Distributed Systems, University of Stuttgart, Stuttgart, Germany;Institute of Parallel and Distributed Systems, University of Stuttgart, Stuttgart, Germany;Institute of Parallel and Distributed Systems, University of Stuttgart, Stuttgart, Germany;Institute of Parallel and Distributed Systems, University of Stuttgart, Stuttgart, Germany
Venue:
DASFAA'05 Proceedings of the 10th international conference on Database Systems for Advanced Applications
Year:
2005

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Abstract

The WWW provides an overwhelming amount of information, which – spatially indexed – can be a valuable additional data source for location-based applications. By manually building a spatial index, only a fraction of the available resources can be covered. This paper introduces a system for the automatic mapping of web pages to geographical locations. Our web robot uses several sets of domain specific keywords, lexical context rules, that are automatically learned, and a hierarchical catalogue of geographical locations that provides exact geographical coordinates for locations. Spatially indexed web pages are used to construct Geographical Web Portals, which can be accessed by different location-based applications. In addition, we present experimental results demonstrating the quantity and the quality of automatically indexed web pages.