I have had some fun in the last few days trying to put together an annotated 
map of China with R and some public GIS data:

http://sourceforge.net/projects/outmodedbonsai/files/snpMatrix%20next/1.17.7.11/China_Choropleth_Maps.pdf/download

It is done, and rather nice... there are a few issues:

- the default pdf() device cannot do CJK with embedded fonts - and cairo_pdf() 
is not hooked up to Sweave yet. I have had a quick look, and it does not look 
too complicated, other than the fact that cairo_pdf() is mutually exclusive 
with pdf(); and the jpeg/png are new to 2.13 so it is probably just nobody has 
gotten round to it. (and cairo_pdf() also behaves differently with the onefile 
option). I guess I am almost saying I might get my hand dirty or help somebody 
else who wants to. So it is probably best to start some discussion.

- Some of the ghostscript/CID font instructions in pdf() are a bit bizarre...

- An earlier version of the above map does not work well with part of 
ghostscript (http://bugs.ghostscript.com/show_bug.cgi?id=692620). So that 
limits to some extent post-processing of cairo_pdf() output.



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