Hi Andrea, It seems to me that SAGA doesn't have this option to check the values inside a kernel. I think the only way to do this is in more steps with an huge amount of computation time.
Basically, my steps now are: reclassify the input raster in 1 (where my pixels have a valid value) and 0. resampling the reclassified raster with my kernel 3x3 using the mode to obtain a mask resampling the input raster with my 3x3 kernel using the average multiply the mask 0-1 with my resampled raster average I did these steps manually and I got a result, but if I run my script I'm obtaining the error "NameError: free variable 'self' referenced before assignment in enclosing scope" and I don't understand why. Really thanks Federico Il giorno mer 8 lug 2020 alle ore 20:06 Andrea Peri <[email protected]> ha scritto: > Have you tried the saga -> resampling inside qgis ? > > A. > > > Il mer 8 lug 2020, 18:50 Federico Gianoli <[email protected]> ha > scritto: > >> Dear all, >> >> I'm looking for a function to resample a raster from 300m to 1km by >> considering the mean value of pixels that are not "No Data", as GDAL Warp >> does. >> But, in case the majority of values within the 3x3 kernel of the 300m >> raster are "No data", "No data" will be assigned to the resampled pixel, >> which is not included in the above mentioned GDAL tool. >> I tried to explain the request here: >> https://gis.stackexchange.com/questions/366978/how-to-resample-a-raster-considering-a-minimum-number-of-valid-pixels]. >> Apparently, neither QGIS nor Gdal have the possibility to make this control >> on the values during the resampling. Do you know if there is an automatic >> way to do this? >> In order to solve this problem, I have done this script >> https://gist.github.com/fgianoli/46a45c5fe042a952580947a282feedc1 to >> create a mask to check my results. But I'm experiencing this error at the >> end of the process, and I don't understand if my code is wrong or is a qgis >> setting: (I'm running version 3.14 under Win10): >> >> NameError: free variable 'self' referenced before assignment in enclosing >> scope >> Traceback (most recent call last): >> File >> "C:/OSGEO4~1/apps/qgis/./python/plugins\processing\gui\AlgorithmDialog.py", >> line 201, in on_complete >> self.feedback.reportError( >> NameError: free variable 'self' referenced before assignment in enclosing >> scope >> >> >> >> Any suggestions? >> Many thanks and kind regards, >> >> Federico >> _______________________________________________ >> QGIS-Developer mailing list >> [email protected] >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > >
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