[postgis-devel] EWKB proposal for OGC

[Paul Ramsey]

Sounds good to me.
P

Martin Daly wrote:

> Paul,
>  
> I like the 'M' part, including POINTM, LINESTRINGM, etc, but I'm 
> uncomfortable with the SRID parts.  EPSG numbers are only sort-of 
> anointed within OGC.  There are also many specs where the SRID is not a 
> number at all, but is a string/anyURI/URN/whatever.  Also, there is 
> already WKT for CRS-s because the EPSG database is not (and does not 
> claim to be) comprehensive.  My gut feeling is that this part would not 
> be well received.
>  
> I have an idea of the members (particulary voting ones) that would be 
> interested in this change proposal.  You and I could canvass their 
> opinion in NY, and make a decision later.  Does that sound OK?
>  
> A Happy New Year to all,
> Martin
> 
>     -----Original Message-----
>     *From:* Paul Ramsey [mailto:pramsey at refractions.net]
>     *Sent:* Thu 30/12/2004 18:35
>     *To:* PostGIS Development Discussion; Martin Daly
>     *Cc:*
>     *Subject:* Re: [postgis-devel] EWKB proposal for OGC
> 
>     Martin,
>     What do you think of the proposal as it stands? If we write and format
>     it up do you think we could put it before the April meeting?
>     Paul
> 
>     strk at refractions.net wrote:
> 
>      > 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;
>      >>>
>      >>
>      >>
>      >>--------------------------------------------------------------------------------
>      >>
>      >>
>      >>
>      >>>_______________________________________________
>      >>>postgis-devel mailing list
>      >>>postgis-devel at postgis.refractions.net
>      >>>http://postgis.refractions.net/mailman/listinfo/postgis-devel
>      >>>
>      >>
>      >>
>      >>_______________________________________________
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>      >
>      >
>