[postgis-devel] [wktraster] Core tests failure for r5841

[Jorge Arévalo]

2011/1/12 Jorge Arévalo <jorge.arevalo at deimos-space.com>:
> On Wed, Jan 12, 2011 at 7:47 PM, Pierre Racine
> <Pierre.Racine at sbf.ulaval.ca> wrote:
>> Jorge, Regina,
>>
>> I get a fresh build of PostGIS raster and the regress test in rt_addband.sql fail on my machine. It was modified by Mateusz which was obtaining different results.
>>
>> In the first case:
>>
>> SELECT St_Value(ST_AddBand(ST_MakeEmptyRaster(1000, 1000, 10, 10, 2, 2, 0, 0, -1), 1, '16BSI', -32769, NULL), 3, 3);
>>
>> Mateusz gets 32767 and I get -32768
>>
>> In the second case:
>>
>> SELECT St_Value(ST_AddBand(ST_MakeEmptyRaster(1000, 1000, 10, 10, 2, 2, 0, 0, -1), 1, '16BSI', 210000.46, NULL), 3, 3);
>>
>> Mateusz gets 13392 and I get -32768
>>
>> I suspect this is a Windows/Linux difference. Do the test works/fails for you? What results do you get?
>>
>> Pierre
>>
>
> Hi,
>
> In my Linux (Ubuntu 9.10) box:
>
> From SELECT St_Value(ST_AddBand(ST_MakeEmptyRaster(1000, 1000, 10, 10,
> 2, 2, 0, 0, -1), 1, '16BSI', -32769, NULL), 3, 3);
>
> I'm getting -32768
>
> And from SELECT St_Value(ST_AddBand(ST_MakeEmptyRaster(1000, 1000, 10,
> 10, 2, 2, 0, 0, -1), 1, '16BSI', 210000.46, NULL), 3, 3);
>
> I'm getting -32768 too
>
> Using last version from trunk (r6604).
>
> Best regards,
>
> --
> Jorge Arévalo
> Internet & Mobilty Division, DEIMOS
> jorge.arevalo at deimos-space.com
> http://mobility.grupodeimos.com/
> http://gis4free.wordpress.com
> http://geohash.org/ezjqgrgzz0g
>
>


Sorry, I forgot to say the result of that test was an error too. So,
rt_addband.sql fails in my machine.



>>>-----Original Message-----
>>>From: Mateusz Loskot [mailto:mateusz at loskot.net]
>>>Sent: 4 septembre 2010 14:28
>>>To: PostGIS Development Discussion
>>>Cc: Pierre Racine
>>>Subject: Re: [postgis-devel] [wktraster] Core tests failure for r5841
>>>
>>>On 31/08/10 21:14, Pierre Racine wrote:
>>>>>From thoses two lines in the rt_addband.sql file:
>>>>
>>>> SELECT St_Value(ST_AddBand(ST_MakeEmptyRaster(1000, 1000, 10, 10, 2, 2, 0, 0, -1), 1, '16BSI', -
>>>32769, NULL), 3, 3);
>>>>
>>>> and further:
>>>>
>>>> SELECT St_Value(ST_AddBand(ST_MakeEmptyRaster(1000, 1000, 10, 10, 2, 2, 0, 0, -1), 1, '16BSI',
>>>210000.46, NULL), 3, 3);
>>>
>>>
>>>Pierre,
>>>
>>>I'm still confused why you are getting such strange values.
>>>The value -32768 is invalid and unexpected, obviously.
>>>It would indicate a bug.
>>>
>>>Fortunately, I do not get such value, but I get the correct ones:
>>>
>>>r1=# SELECT St_Value(ST_AddBand(ST_MakeEmptyRaster(1000, 1000, 10, 10,
>>>2, 2, 0, 0, -1), 1, '16BSI', -32769, NULL), 3, 3);
>>>WARNING:  Initial pixel value for 16BSI band got truncated from
>>>-32769.000000 to 32767
>>> st_value
>>>----------
>>>    32767
>>>(1 row)
>>>
>>>r1=# SELECT St_Value(ST_AddBand(ST_MakeEmptyRaster(1000, 1000, 10, 10,
>>>2, 2, 0, 0, -1), 1, '16BSI', 210000.46, NULL), 3, 3);
>>>WARNING:  Initial pixel value for 16BSI band got truncated from
>>>210000.460000 to 13392
>>> st_value
>>>----------
>>>    13392
>>>(1 row)
>>>
>>>
>>>
>>>Nevertheless, I've updated the expected output with correct values:
>>>
>>>http://trac.osgeo.org/postgis/changeset/5907
>>>
>>>Best regards,
>>>--
>>>Mateusz Loskot, http://mateusz.loskot.net
>>>Charter Member of OSGeo, http://osgeo.org
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>>
>



-- 
Jorge Arévalo
Internet & Mobilty Division, DEIMOS
jorge.arevalo at deimos-space.com
http://mobility.grupodeimos.com/
http://gis4free.wordpress.com
http://geohash.org/ezjqgrgzz0g