Ontology-driven discovery of geospatial evidence in web pages |
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Authors: | Karla A V Borges Jr" target="_blank">Clodoveu A DavisJr Alberto H F Laender Claudia Bauzer Medeiros |
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Affiliation: | 1.PRODABEL-Empresa de Informática e Informa??o do Município de Belo Horizonte,Belo Horizonte,Brazil;2.Departamento de Ciência da Computa??o,Universidade Federal de Minas Gerais,Belo Horizonte,Brazil;3.Instituto de Informática,Universidade de Campinas,Campinas,Brazil |
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Abstract: | When users need to find something on the Web that is related to a place, chances are place names will be submitted along with
some other keywords to a search engine. However, automatic recognition of geographic characteristics embedded in Web documents,
which would allow for a better connection between documents and places, remains a difficult task. We propose an ontology-driven
approach to facilitate the process of recognizing, extracting, and geocoding partial or complete references to places embedded
in text. Our approach combines an extraction ontology with urban gazetteers and geocoding techniques. This ontology, called
OnLocus, is used to guide the discovery of geospatial evidence from the contents of Web pages. We show that addresses and
positioning expressions, along with fragments such as postal codes or telephone area codes, provide satisfactory support for
local search applications, since they are able to determine approximations to the physical location of services and activities
named within Web pages. Our experiments show the feasibility of performing automated address extraction and geocoding to identify
locations associated to Web pages. Combining location identifiers with basic addresses improved the precision of extractions
and reduced the number of false positive results. |
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