[postgis-users] st_area and 0.001953125 (Possible Bug)

[Marc Jansen]

Hi Birgit,

good catch. I am pretty sure this is some sort of a bug, possibly 
related to 32-/64-bit architecture.

I opened a bug [1], and cced Birgit. Add comments there as you dig deeper.

Regards,
Marc

[1] http://trac.osgeo.org/postgis/ticket/503


Birgit Laggner wrote:
> Hi Maxime,
>
> well, this would argue against the guess from Marc regarding the
> versions change from 1.4.0 to 1.4.1 (I can't imagine that 1.5.1 has
> errors that were already debugged in 1.4.1). What catches my eye is that
> all systems that show the error are 64-bit systems and the one from Marc
> providing the true result is a 32-bit system. Maybe this could be
> leading to an explanation??
>
> Thanks  and regards,
>
> Birgit.
>
>
> On 15.04.2010 13:48, Maxime van Noppen wrote:
>   
>> On 04/15/2010 01:37 PM, Marc Jansen wrote:
>>   
>>     
>>> Hi Birgit,
>>>
>>> I can confirm your results on
>>>     
>>>       
>> To help tracking down the bug: I have the same problem (areas
>> 0.001953125 or 0 for the query on the pastebin) on :
>>
>> PostgreSQL 8.4.3 on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC)
>> 4.4.3 20100316 (prerelease), 64-bit
>>
>> POSTGIS="1.5.1" GEOS="3.2.0-CAPI-1.6.0" PROJ="Rel. 4.7.1, 23 September
>> 2009" LIBXML="2.7.6" USE_STATS
>>
>>   
>>     
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>
>   


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