time zone geography
eggert at twinsun.com
Wed Mar 7 20:25:13 UTC 2001
> From: Chuck Ellis [mailto:cellis at gaz.com]
> Sent: Friday, February 16, 2001 5:45 PM
> I am willing to devote some more time to trying to create the
> fundamental tz map that is needed for the generalized application
> that Arthur is discussing, but it is too much for one person alone
It would very nice to have such a map and I'm happy to hear of
progress being made in this area. Sorry, I haven't had time to think
about it much, though.
Do you know of the existing free databases in this area? They might
help you get started (or, if they're low quality, I suppose they might
slow you down). Here are the databases I know about; I've added links
to them in my latest proposed patch to tz-link.htm.
* Manifold.net's Free Maps and GIS Data includes a Manifold-format map
of world time zone boundaries distributed under the GNU General Public
License (GPL). <http://www.manifold.net/download/freemaps.html>
* The GeoCommunity's International Time Zones publishes the same data in
other formats. <http://software.geocomm.com/data/intl_timezones.html>
* The US Geological Survey's National Atlas of the United States
publishes the Time Zones of the United States in the public domain.
* The GeoCommunity lists several commercial sources for International
Time Zones and Time Zone Data. Obviously they can't be copied, but
they might be useful for spot checks.
More information about the tz