Abstract:
In this paper we present an algorithm which automatically extracts geopositional coordinate index terms from text to support georeferenced document indexing and retrieval. Under this algorithm, words and phrases containing geographic place names or characteristics are extracted from a text document and used as input to database functions which use spatial reasoning to approximate statistically the geoposition being referenced in the text. We conclude with a discussion of preliminary results and future work. This research was sponsored by the University of California and Digital Equipment Corporation under Research Grant #1243. and a consortium of government and industrial partners. i Contents 1 Introduction 1 2 Previous Work in Georeferencing of Text Documents 1 2.1 Text Indexing : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 2 2.1.1 Library of Congress Subject Headings : : : : : : : : : : : : : : : : : : : : : : : : : : 2 2.1.2 Keyword Inde...
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