Abstract
We introduce the idea of a spatial search engine based on geotags. Geotags are keywords linked to a concrete position. User generated geotags are available from Web 2.0 portals like Flickr1 or Google Maps2. We collected a sample dataset of about 300.000 geotags. In the following we explain a prototype implementation of a search engine and describe how to compute the spatial relevance of a tag. The last section gives an outlook about our research goals in this area and discusses the challenges and possible benefits of integrating semantic information.
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