[R] Mapping in R - in the common sense
uctpzcs at ucl.ac.uk
Wed Nov 7 11:56:05 CET 2001
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 from
that (supposing that the map is drawn the same way, ie redundantly with full polygons)? If yes, there
could be a matrix with the identifiers and the polygon parameters.... If no, is there any other/better
idea. Has anyone tried this before?
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