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Discovery and retrieval of Geographic data using Google
| Nome: | Descrição: | Tamanho: | Formato: | |
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| 1.9 MB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
The growth of content in the Internet makes the existence of effective ways to retrieve
the desired information fundamental. Search engines represent applications that fulfil
this need. In these last years it has been clearly increased the number of services and
tools to add and use the geographic component of the content published on the World
Wide Web, what represents a clear trend towards the so called GeoWeb. This web
paradigm promotes the search of content based also in their geographical component.
Here is presented a study about the possibilities of using the different services and
tools that Google offers to discover and retrieve geographic information. The study is
based in the use of Keyhole Markup Language files (KML) to express geographic
data and the analysis of their discovery and indexing. This discovery process is done
by crawlers and the study tried to obtain objective measures about the time and
effectiveness of the process simulating a real case scenario. In the other side the
different KML elements that could allocate information and metadata were analyzed.
In order to better understand which of these elements are effectively used in the
indexing process a test data set composed by KML files containing information in
these elements were launched and the obtained results analyzed and commented. With
the experiment’s results the use of these services and tools are analyzed as a general
solution for Geographic Information Retrieval. Finally some considerations about
future studies that could improve these tools usage are exposed.
Descrição
Dissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial Technologies
Palavras-chave
Geographic information systems Google Geographic information retrieval Keyhole markup language Metadata