[gdal-dev] Reproject Landsat USGS image

[Luisa Peña]

Hello

I got a reply  to my message stating that " GDAL ignores a flag in the
GEOTIF specification that says whether the coordinates are for the center or
the lower-left of each pixel. "
Is this true? It's exacly what I am obtaining and what Markus Neteler
explained me (about the useage of NN method)

Can anyone confirm me?
Thanks
Luisa


2011/3/25 Luisa Peña <luisapena1979 at gmail.com>

> Back again on this
>
> I have talked with Markus Neteler and he told me that if I use gdalwarp
> with NN method, I will get a pixel shift  and he suggested me to use
> bilinear method. The problem with bilinear is that my pixel values are
> changed (based on bilinear method)
> So is there any method to keep the pixels values and without any pixel
> position shift?
> Thanks
>
> Best regards,
> Luisa
>
>
> 2011/3/23 Luisa Peña <luisapena1979 at gmail.com>
>
>> For now GDAL15 (the one that comes with winGRASS GIS) and GDAL16 binary.
>> Why?
>> (I have sent this to the wrong mailing list)
>>
>>
>>> Why?
>>>
>>>
>>>
>>> 2011/3/22 Kyle Shannon <ksshannon at gmail.com>
>>>
>>>> What version of gdal are you using?
>>>>
>>>> # ============================
>>>> Kyle Shannon
>>>> Physical Science Technician
>>>> RMRS Fire Sciences Lab
>>>> Fire, Fuels & Smoke - RWU 4405
>>>> 5775 Highway 10 W.
>>>> Missoula, MT 59808
>>>> (406)829-6954
>>>> kshannon at fs.fed.us
>>>> # ============================
>>>>
>>>>
>>>> On Tue, Mar 22, 2011 at 15:36, Luisa Peña <luisapena1979 at gmail.com>wrote:
>>>>
>>>>> Greetings
>>>>>
>>>>> I have sent an message a couple of days ago (
>>>>> http://lists.osgeo.org/pipermail/gdal-dev/2011-March/028124.html)
>>>>> about this
>>>>> I used gdalwarp with this formulation
>>>>> gdalpwarp -t_srs <EPSG> -tr 30 30 input.tif output.tif
>>>>> Well it works fine but It seems to be with a deviation of half pixel on
>>>>> Latitude and half pixel on Longitude when compared with a similar operation
>>>>> in ARCGis
>>>>>
>>>>> Maybe I'm missing some parameter that might be relevant. Any
>>>>> suggestion?
>>>>>
>>>>> Thanks
>>>>> Luisa
>>>>>
>>>>> _______________________________________________
>>>>> gdal-dev mailing list
>>>>> gdal-dev at lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>>>
>>>>
>>>>
>>>
>>
>
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