Subject: RE: [Geopriv] Timezones in Civic locations

From: "Winterbottom, James" <[email-masked]>
Date: Tue, 28 Mar 2006 09:45:38 -0600

I support this also.

> -----Original Message-----
> From: Henning Schulzrinne [mailto:[email-masked]]
> Sent: Wednesday, 29 March 2006 1:43 AM
> To: Carl Reed OGC Account
> Cc: [email-masked]; Thomson, Martin
> Subject: Re: [Geopriv] Timezones in Civic locations
> 
> As I noted during the meeting, the RPID (rich presence) information
> already includes time-offset information. During the discussion for
that
> draft, it was said that the most useful aspect of timezone information
> is to avoid accidentally calling somebody when it is 2 am at that
> location. Providing time offset in presence is the most direct way to
do
> that and avoids having to translate time zone information like
> Americas/New_York into what you actually care about. There are known
> problems during the transition to and from DST, but those events are
> rare enough and the error small enough that they didn't seem to matter
> for the applications that people had in mind.
> 
> In short, I also see no need for this information in GEOPRIV objects
or
> data formats.
> 
> Henning
> 
> Carl Reed OGC Account wrote:
> > I do not see any requirement for time zone. We never use time zone
for
> > any of our standards. Only time and we use the ISO standards for
> > expressing time.
> >
> > Carl
> >
> > ----- Original Message ----- From: "Thomson, Martin"
> > <[email-masked]>
> > To: <[email-masked]>
> > Sent: Monday, March 27, 2006 10:14 PM
> > Subject: [Geopriv] Timezones in Civic locations
> >
> >
> >> The issue was raised about the inclusion of timezone in the civic
> >> address format.I strongly suggest that this information is left out
of
> >> the format for the following reasons:
> >>
> >>
> >> * A timezone is time-dependent, but the proposal was not to support
> >> things like daylight savings.  To me, that reduces the usefulness
of
> >> the information.  If the 15 degree band of longitudes is important
> >> information, we have geodetic encodings for that information.
> >> * Timezone is not location information.  Timezone is one piece of
data
> >> that can be derived from location information, but we need to be
very
> >> clear about what is location data and what is derived from it.
> >>
> >> Unless someone has a more convincing argument for their inclusion
in
> >> the civic draft, I would like to propose that we progress the draft
> >> without this datum.
> >>
> >> Cheers,
> >> Martin.
> >>
> >>
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