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Integrating Web Data and Geographic Knowledge into Spatial Databases
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Author(s): Alberto H.F. Laender (Federal University of Minas Gerais, Brazil), Karla A.V. Borges (Federal University of Minas Gerais, Brazil and PRODABEL, Brazil), Joyce C.P. Carvalho (Federal University of Minas Gerais, Brazil), Claudia B. Medeiros (University of Campinas, Brazil), Altigran S. de Silva (Federal University of Amazonas, Brazil)and Clodoveu A. Davis Jr. (PRODABEL, Brazil & Catholic University of Minas Gerais, Brazil)
Copyright: 2005
Pages: 26
Source title:
Spatial Databases: Technologies, Techniques and Trends
Source Author(s)/Editor(s): Yannis Manalopoulos (Aristotle University of Thessaloniki, Greece), Apostolos Papadopoulos (Aristotle University of Thessaloniki, Greece)and Michael Gr. Vassilakopoulos (Technological Educational Institute of Thessaloniki, Greece)
DOI: 10.4018/978-1-59140-387-6.ch002
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Abstract
With the phenomenal growth of the World Wide Web, rich data sources on many different subjects have become available online. Some of these sources store daily facts that often involve textual geographic descriptions. These descriptions can be perceived as indirectly georeferenced data – for example, addresses, telephone numbers, zip codes and place names. In this chapter we focus on using the Web as an important source of urban geographic information and propose to enhance urban Geographic Information Systems (GIS) using indirectly georeferenced data extracted from the Web. We describe an environment that allows the extraction of geospatial data from Web pages, converts them to XML format and uploads the converted data into spatial databases for later use in urban GIS. The effectiveness of our approach is demonstrated by a real urban GIS application that uses street addresses as the basis for integrating data from different Web sources, combining the data with high-resolution imagery.
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