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List: postgis-users
Subject: RE: [postgis-users] projection management
From: "Ken Boss" <Ken.Boss () dnr ! state ! mn ! us>
Date: 2007-03-28 14:33:36
Message-ID: 460A366F.26F2.0021.0 () dnr ! state ! mn ! us
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>>> On 3/27/2007 at 10:53 PM, in message
<436524.29481.qm@web33212.mail.mud.yahoo.com>, Brent Wood <pcreso@pcreso.com>
wrote:
>>
>> Thanks for the reply, that clarifies matters nicely. I think I'm
>> understanding also that setsrid(the_geom, the_srid) rolls that srid
>> right into the binary representation of the geometry. I wonder if it
>> might be desirable/possible in a future version, then, to have
>> astext(the_geom) output the srid along with the text representation of
>> the geometry.
>
> I believe WKT is defined by the OGC, as part of the SFS spec that PostGIS
> complies with. EWKT was created to address this limitation of the WKT format.
> It is not likely that OGC will revise the SFS/WKT spec, so it is also unlikely
> that PostGIS will modify the string returned by WKT.
>
> So if you require a SRID in the output, use EWKT instead of WKT.
>
> Standards are usually a good thing :-)
Fully agreed. As a postgis newbie, I was as yet unfamiliar with the wonders of EWKT and EWKB.
Hats off to the Refractions folks for a nice job of covering both user needs and standards conformance,
and thanks to the list for the education.
--Ken
>
> Cheers
>
> Brent
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> postgis-users@postgis.refractions.net
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