[postgis-devel] EWKB proposal for OGC

[strk at refractions.net]

On Tue, Dec 28, 2004 at 01:45:09AM +0900, Paul Selormey wrote:
> Unfortunately, the 99-402r2 is not yet available to some of us
> the non-OGC members, and therefore commenting on these extensions
> may not be right.

Martin Daly sent that document as an attachent on this list:
http://postgis.refractions.net/pipermail/postgis-devel/2004-December/000695.html

> I have just these:
> 1. You have used "misure" in the documents, do you mean "measure"?

Yes, corrected.

> 2. I wish the presence of the SRID in the geometry WKT is a suffix, since
>    it can be considered optional and should not break existing codes:
>    "POINT(1 2);SRID=4326"

It *is* optional (meaning undefined SRID, -1 for postgis).
Would existing code work with POINTM(1 2 3) or POINT(1 2 3 4) ?
Also, EWKB will also probably break existing code, any existing
case of compatibility ?

> BTW, any plan to define WTK for triangle, rectangle, circle and other
> geometries defined in GML 3.x?

Not that I'm aware of.
--strk;

> 
> Best regards,
> Paul.
> 
> ----- Original Message ----- 
> From: <strk at refractions.net>
> To: "PostGIS Development Discussion" <postgis-devel at postgis.refractions.net>
> Cc: "Paul Ramsey" <pramsey at refractions.net>
> Sent: Monday, December 27, 2004 9:01 PM
> Subject: [postgis-devel] EWKB proposal for OGC
> 
> 
> >As suggested by Martin Daly I've made a draft proposal for ZM and
> >SRID inclusion in WKB and WKT.
> >
> >Differently to the Z-Geometry proposal I did not specify semantic
> >of the M values, as I don't see any "standardizable" behaviour
> >for them. For example, M(isures) could represent temperature
> >(linear interpolation meaningful) as well as time (meaningless
> >linear interpolation).
> >
> >Draft attached, comments expected.
> >
> >--strk;
> >
> 
> 
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