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...Arc v.8x coverage into v.7x, but > that made no difference (ESRI documenation says they should be the same anyway). D. Morisette has also reported some 'weird' coverages, which do not follow the standards. Perhaps you have one of them. Please, take a look at http://pages.infinit.net/danmo/e00/docs/v7_bin_cover.html Anyway, if you want to send me your data, I'll be pleased to test them myself. This may help. Regards, -- Virgilio G?mez Rubio Dpto. Estad?stica e I. O. - Facultat de Matem?tiques Avda. Vicent A. Estell?s, 1 - 46100 Burjassot Valencia - SPAIN http:/...

Dear R people, I am wondering how difficult it would be to produce graphs based on maps in R (like "a county is red where x is high"). I reckon this requires the coordinates for the polygons that make up the map and also a mapping to a set of identifiers to assign colours, hatches, etc. Would it be possible to pass R a vector graphics of the map and back out the polygon definitions