Unicode symbols on maps

In preparation

> library(grid)
> plot(1,1,type='n'); grid.text("\u4F60\u597D") # chinese
> plot(1,1,type='n'); grid.text("\u25CB\u25D4\u25D1\u25D5\u25CF\u25CD") # circles
> plot(1,1,type='n'); grid.text("\u2639\u263A\u263C\u2640\u2642") # smiley, sun, male/female

• R-news 2006-2 / Paul Murrell, Brian Ripley: Non-Standard Fonts in PostScript and PDF Graphics
• Paul Murrell: fonts; devices; gpars; pdf Encoding; Grid; Grid/slides; CM
• 1001 free fonts
• Fonts in R-plots; using Unicode dingbat like glyphs
• R-bloggers: Unicode symbols in R
• Changing the fonts in R-plots
• R-manual: grDevices, Postscript Fonts, Postscript, Plotmath, points
• Pipermail: A, B, C
• Omegahat: index, RFreetype
• http://yihui.name/en/2010/03/font-families-for-the-r-pdf-device/
• http://www.talkstats.com/showthread.php/9167-True-Type-Fonts-in-R-Plots
• http://cran.r-project.org/doc/contrib/Short-refcard.pdf
• http://www.statoek.wiso.uni-goettingen.de/mitarbeiter/ogi/pub/r_workshop.pdf
• http://en.wikibooks.org/wiki/Statistical_Analysis:_an_Introduction_using_R/R_basics
• Quick-R: axes, parameters
• http://www.fort.usgs.gov/brdscience/learnR.htm
• http://www.gardenersown.co.uk/Education/Lectures/R/graphs.htm
• http://r.789695.n4.nabble.com/quot-Low-Pain-quot-Unicode-Characters-in-pdf-graph-td3524275.html
• http://students.washington.edu/what/plotcharactersUnicode.pdf
• http://www.mail-archive.com/r-help@r-project.org/msg65541.html
• http://www.mail-archive.com/ling-r-lang-l@mailman.ucsd.edu/msg00120.html
• http://www.inside-r.org/r-doc/grDevices/group
• http://depts.washington.edu/phonlab/resources/SH_vowel_plots_R.pdf
• R for Windows FAQ: index, Internationalization
• http://cairographics.org/tutorial/
• http://www.gtk.org