A Study of Automatic Recognition Mechanisms of Meanings of Location Names in Document Databases

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We developed a context-dependent geocoding system in our previous work. Geocoding systems are designed for translating location names to corresponding geocodes. The main feature of our geocoding system is to recognize the meanings of ambiguous location representations by handling the spatial contexts of the representations. We define a spatial context as a set of terms strongly relating to a single meaning of an ambiguous location representation. Our geocoding system was implemented to use a special metadatabase maintaining spatial contexts of landmarks.In this study, we have developed a new implementation method for generating the metadatabase. The main feature of our method is to extract the spatial contexts of landmarks by handle the co-occurrence of the landmark names and feature words in a text database. Thus, our geocoding system can be applied to various text databases. We have demonstrated the feasibility and effectiveness of our method through several experiments.