Jochen L. Leidner ( http://www.jochenleidner.com/ ) is a researcher and systems architect with a strong interest in geospatial systems, who specialises on geo-coding, toponym resolution ( see my Ph.D. thesis "Toponym Resolution in Text" at the University of Edinburgh, available from Amazon here http://www.amazon.com/Toponym-Resolution-Text-Annotation-Applications/dp/1581123841/ref=sr_1_1?ie=UTF8&s=books&qid=1247648645&sr=8-1 ) and all applications at the intersection of text and space.