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Spatially-Aware

Information Retrieval

on the Internet

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RESEARCH AREAS

User and system requirements –

exploration of different aspects of spatially-aware retrieval with regard to textual and graphical interactions. The results will feed into a specification of system functionality.

Geographical and conceptual ontologies -

model both the vocabulary and the spatial structure of places for purposes of information retrieval. This enables retrieval of resources referring to alternative place names (e.g. historical variants) and places that are similar in location to the place specified in the query.

Metadata extraction and semantic enrichment –

automatic and/or semi-automatic ontology-based textual and geo-data analysis techniques for generating geographical annotations will be developed.

Relevance ranking –

will develop procedures that can determine similarity between metadata extracted from a web page and the content of a geographical web query, in order to present relevance-ranked query results to the user. Ontology-based geographical relevance ranking will be performed.

Design and implementation of core spatial search engine –

will create and test the performance of the core search engine functionality for spatially-oriented search and retrieval with a large collection of web documents. There are two main aspects: extension of an existing basic search system to support a large test collection, and introduction of spatial indexing of the web database.

Multi-modal search engine interface –

will facilitate query construction via a structured textual dialogue, interactive multi-scale maps, and sketching. The ontologies will be used to support geographical term expansion for query formulation and user feedback. Query results will be returned in textual and graphical form.

Evaluation –

will determine the effectiveness and usability of the final prototype for purposes of geographical information retrieval on the Internet.

 

 

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