[postgis-users] The EWKB/EWKT specs should be part of the PostGIS manual

Ben Harper rogojin at gmail.com
Fri Jul 3 03:41:51 PDT 2009


And I'm on 1.3, but I'll test with 1.4 before calling anything out again.

On Fri, Jul 3, 2009 at 12:41 PM, Ben Harper<rogojin at gmail.com> wrote:
> Thanks for the feedback.
>
> I'll take some time on the weekend to prepare patches, etc.
>
> Ben
>
> On Fri, Jul 3, 2009 at 11:07 AM, Mark
> Cave-Ayland<mark.cave-ayland at siriusit.co.uk> wrote:
>> Ben Harper wrote:
>>
>>> Sorry to rant about an open source product that's free,
>>>
>>> But the EWKB/EWKT specs should really be included in the PostGIS manual.
>>> Only after a fair amount of mistrial did I discover this:
>>>
>>>
>>> http://postgis.refractions.net/pipermail/postgis-devel/2004-December/000710.html
>>>
>>> If that was part of the manual, it would have saved me a fair amount
>>> of confusion.
>>
>> Thanks for the feedback. I probably speak for the majority of the PostGIS
>> team in that we are so familiar with the code that perhaps things that are
>> obvious to us aren't necessarily obvious to the users. Most of our focus is
>> on preparing for the 1.4 release at the moment, so if you could contribute a
>> patch then it would be gratefully accepted.
>>
>>> Additionally, the PostGIS manual claims that "every valid WKB/WKT is a
>>> valid EWKB/EWKT" but I find this to be untrue.
>>> Specifically, if I construct a WKB PointZ geometry, as specified by
>>> http://portal.opengeospatial.org/files/?artifact_id=18241
>>> and I try to read it via GeomFromEWKB(), I get garbage (A COMPOUND
>>> CURVE is what comes out).
>>> The docs should be updated to reflect this fact, or the WKB parser
>>> should support this part of the spec.
>>
>> Hmmm this smells like a bug. Are you working with 1.4 or 1.3? Can you post a
>> specific test case for us to look at?
>>
>>
>> Many thanks,
>>
>> Mark.
>>
>> --
>> Mark Cave-Ayland - Senior Technical Architect
>> PostgreSQL - PostGIS
>> Sirius Corporation plc - control through freedom
>> http://www.siriusit.co.uk
>> t: +44 870 608 0063
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>>
>



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