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...positioned in such a way as to minimize label overlap and occlusion. This is a topic with a large, but scattered literature. In CS, it is considered NP-hard, but there are a variety of approximate solutions. The most complete bibliography I've found is the Map-Labeling Bibliography, http://liinwww.ira.uka.de/bibliography/Theory/map.labeling.html AFAIK, the only concrete and published implementation is a Fortran program published by Noma (below), and then adapted by Warren Kuhfeld at SAS in PROC PLOT, and used in his %plotit macro. Journal Title - Psychometrika Article Title - H...