Subject: RE: [Geopriv] draft-thomson-geopriv-geo-shape-00

From: "Winterbottom, James" <[email-masked]>
Date: Sat, 4 Mar 2006 23:26:24 -0600

Is the suggestion to make this unbounded in Geo-Shape, but make a
recommendation in PIDF-LO profile?

> -----Original Message-----
> From: James M. Polk [mailto:[email-masked]]
> Sent: Sunday, 5 March 2006 3:11 PM
> To: Henning Schulzrinne; [email-masked]
> Subject: Re: [Geopriv] draft-thomson-geopriv-geo-shape-00
> 
> At 09:48 PM 3/4/2006 -0500, Henning Schulzrinne wrote:
> 
> >In the draft, it states
> >
> >>"For interoperability with [3GPP.TS23032], the number of points has
> >>been limited to 16".
> >
> >It seems unnecessary to make this a general restriction. PIDF will be
> >used in many contexts where this is not necessary or appropriate. Why
> >shouldn't I be able to describe "I'm in Foo County", and provide the
> >boundary of that county?
> 
> I'd also be curious how one would chose which 16 coordinate pairs
> represent
> the US or Canada or England/UK or Japan without getting seriously out
into
> international waters or into another country's territory (think about
how
> to get around the Great Lakes between the US and Canada).
> 
> I believe someone (our chair Andy?) already showed Manhattan in pairs
and
> had to use something like 670.  PIDF-LO can include more, and we
shouldn't
> be restricted in operation at this design level.  If an implementation
> wants to maintain interoperability with 3GPP, they can choose to only
use
> 16 points, and have limited precision in their results, but that's an
> implementation's choice.
> 
> You could say something like this:
> 
>          "In order to maintain seamless interoperability with 3GPP
> implementations, per [3GPP.TS23032], there needs to be a maximum of 16
> points used."
> 
> But this cannot be normative; but just stated as guidance.
> 
> 
> >Henning
> >
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> 
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