FW: IANA time zone registration - proposal

Ken Pizzini tz. at explicate.org
Tue Jan 18 00:20:17 UTC 2005

On Mon, Jan 17, 2005 at 03:47:37PM -0800, Paul Eggert wrote:
> > From: Doug Royer [mailto:Doug at Royer.com] 
> > Sent: Monday, January 17, 2005 2:12 PM
> > I am adding the POLYGON property targeted for the -01 version that has an
> > ADD/DELETE parameter to allow for the optional inclusion of
> > latitude/longitude geographic areas to be included that include (add) and
> > exclude (delete) areas from the time zone geographic region (again from the
> > CALSCH mailing list discussions).
> It would be interesting to see a database containing some of that
> information, as a sample, as I don't offhand follow why DELETE would
> be useful.

Consider the imact of a region like America/Indiana/Knox on the
polygon for America/New_York --- you need to subtract a polygon
for the former out of the polygon for the latter in order to properly
describe the geographic region encompassed by America/New_York.

		--Ken Pizzini

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