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Fix match.map() for world map
Add some more island names to the world database
Updated a few web references in man pages.
MAJOR:
New 'world' database, taken from the public domain "Natural Earth" project. Many new countries have appeared since 1990. E.g. map(region="USSR") will no longer work.
The old map is still available as 'legacy_world'. It is also possible (during a transition period) to switch completely to the old database by giving the command world.legacy(TRUE) or even by setting the environment variable 'R_MAP_DATA_LEGACY=TRUE' prior to loading the package.
ADDITIONS:
data set iso3166 containing ISO-3166 country codes.
New functions iso.expand(), sov.expand() and iso.alpha() that use this table for converting country names to ISO codes or back. Also expansion by sovereignty. Could be used e.g. for country labels.
SMALL CHANGES & FIXES
Internally now uses perl-style regular expressions. Useful for e.g. 'negative' regular expressions:
"Norway(?!:Svalbard)" means Norway and all islands except Svalbard.
map(reg="(?!Belgium)",fill=TRUE,xlim=c(-10,20),ylim=c(40,60))
map.text(...,exact=TRUE) now behaves as documented. To get the old (non-documented) behaviour (plot map with exact=FALSE, write text for exact=TRUE) you could now use 2 commands:
map(...,exact=FALSE)
map.text(...,exact=TRUE,add=TRUE)
match.map had a potential bug with locale-dependent behaviour of order().