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This paper reports the participation of the XLDB Group from the University of Lisbon at the 2007 GeoCLEF task. We adopted a novel approach for GIR, focused on handling geographic features and feature types on both queries and documents, generating geographic signatures with multiple geographic concepts as a scope of interest. We experimented new query(More)
Today many companies decide to select free/open source software (F/OSS) products for various reasons, for example, economical or quality reasons. For many areas of application, they can choose from a variety of packages provided by different communities. Introducing a software tool into a company – either for supporting a certain business process or for the(More)
Web information is ephemeral. Several organizations around the world are struggling to archive information from the web before it vanishes. However, users demand efficient and effective search mechanisms to access the already vast collections of historical information held by web archives. The Portuguese Web Archive is the largest full-text searchable web(More)
This paper reports the participation of the University of Lisbon at the 2007 GeoCLEF task. We adopted a novel approach for GIR, fo-cused on handling geographic features and feature types on both queries and documents, generating signatures with multiple geographic concepts as a scope of interest. We experimented new query expansion and text mining(More)
The web was invented to quickly exchange data between scientists, but it became a crucial communication tool to connect the world. However, the web is extremely ephemeral. Most of the information published online becomes quickly unavailable and is lost forever. There are several initiatives worldwide that struggle to archive information from the web before(More)
Pretendeu-se determinar se a semântica geográfica presente nos documentos, cap-turada através das assinaturas geográficas, contribui para uma melhoria dos resul-tados obtidos para pesquisas de cariz geográfico. São propostas e experimentadas diversas estratégias para o cálculo da semelhança entre as assinaturas geográficas de interrogações e documentos. A(More)
Today many companies decide to select Free/Open Source software (F/OSS) products for various purposes, for example because of economical or quality reasons. For many areas of application they can choose from a variety of packages provided by different communities. Introducing a software tool into a company – either for supporting a certain business process(More)
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