Spatial Information Retrieval with Place Names
|Other Titles:||Räumliche Informationsrecherche mit Ortsnamen||Authors:||Vögele, Jörg-Thomas||Supervisor:||Schlieder, Christoph||1. Expert:||Schlieder Christoph||2. Expert:||Freksa, Christian||Abstract:||
This work outlines an approach to handle the spatial dimension of information retrieval, i.e. queries of the type concept @ location. It applies a low-level notion of spatial relevance that is closely linked to the location, or geo-reference, of an information object. Methods for a semi-qualitative representation of spatial regions, and for the evaluation of the relative spatial relevance of information objects that are indirectly geo-referenced by place names, are presented. The approach supports a representation of crisp and vague geographic regions that is adequate for most information retrieval tasks. A graph-based abstraction of polygonal tessellations used as referenece system reduces data volumes and supports efficient reasoning algorithms. By combining a semi-qualitative approximation of Euclidean distance with a relative measure for the hierarchical part-of relations of regions into one simple metric, the partonomic semantics of hierarchical place name structures can be leveraged for information retrieval processes.The method was evaluated against a large-scale operational meta-information system (Umweltdatenkatalog - UDK). Implementations include the BUSTER information broker middleware and an OGC compatible catalog-service within a spatial data infrastructure. Other potential application areas include the creation of machine-readable indices of digital maps, the development of spatial reasoning modules for highly distributed ad-hoc (P2P) networks and Semantic Web applications, as well as the integration into new light-weight and location-based applications.
|Keywords:||spatial information retrieval, qualitative spatial reasoning, spatial cognition, metadata, semantic web, gis, location-based services||Issue Date:||28-May-2004||URN:||urn:nbn:de:gbv:46-diss000009780||Institution:||Universität Bremen||Faculty:||FB3 Mathematik/Informatik|
|Appears in Collections:||Dissertationen|
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