[Qgis-user] reduce resolution of an image in qgis

[carlos h]

Hi, excuse the ignorance, how can I use the grdal translate tools from the
processing toolbox? Thank you

Carlos



El vie, 24 jun 2022 a las 7:17, Zoltán Siki (<siki1958 at gmail.com>) escribió:

> you can used grdal translate from the processing  toolbox. You have to add
> additional command line parameters, for example  -outtsize 50% 50% to make
> pixel double size alternatively you can also use -tr switch to define the
> output pixel size e.g. -tr 1.0 1.0 to change the resolution to 1
> georeferenced unit of your raster.
>
> Regards,
> Zoltan
>
> carlos h via Qgis-user <qgis-user at lists.osgeo.org> ezt írta (időpont:
> 2022. jún. 23., Cs, 20:51):
>
>>
>> Hello, I have an NDVI image that has a pixel of 4 centimeters, that is,
>> 16 square centimeters.
>>
>> I have 2 doubts:
>>
>> 1. What method can I use to generalize the NDVI image to 1 square meter
>> in pixel size?
>>
>> 2. When generalizing the NDVI image to 1 square meter per pixel, what
>> value does that new pixel take? the mean value of all pixels in 1 square
>> meter? the maximum value of the pixels? etc, I ask this because if the
>> original NDVI image has a pixel of 4 centimeters (16 cm2), in 1 square
>> meter there are more or less 625 pixels, then what pixel value does it take
>> if it is generalized to 1 square meter? the average? the maximum value?
>>
>>
>> Thank you very much
>>
>> Carlos
>>
>>
>> _______________________________________________
>> Qgis-user mailing list
>> Qgis-user at lists.osgeo.org
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>
>
> --
> Üdv.
> Siki Zoltán
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20220624/868967a6/attachment-0001.htm>