Gabor, Thanks for your tip about zone.tab. It provides country codes and lat/lon of the zone's principal location, which while useful is not exactly what I need. I would like to know the coordinates of time zone boundaries. Better still would be a function, which returns the name of the time zone in which given lat/lon is situated.
For example, in which time zone is 22N,166W? And at what times of year might daylight savings time be in effect? Regards, Carlisle On Sat, Sep 21, 2013 at 3:17 AM, Gabor Grothendieck <ggrothendi...@gmail.com > wrote: > On Fri, Sep 20, 2013 at 4:31 PM, carlisle thacker > <carlisle.thac...@gmail.com> wrote: > > I was looking for something like shown on the map: > > > http://upload.wikimedia.org/wikipedia/commons/8/88/World_Time_Zones_Map.png > > > > Information about local daylight savings times would also help. > > > > The data are from ships, supposedly in local time, but no time-zone info > is > > given. A function that would return time zone and whether or not > daylight > > savings time applies at given date would would help. I'm trying to track > > down more information about the data and whether they can be referenced > to > > UTC. > > The zone.tab file has this information. See the Examples section at > the end of ?Sys.timezone for info on its whereabouts. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
