Re: [gdal-dev] What is the purpose of -nosrcalpha in gdalwarp?

2020-11-08 Thread Even Rouault
On dimanche 8 novembre 2020 16:33:20 CET Rahkonen Jukka (MML) wrote: > Hi, > > I noticed this question from gis.stackexchange > https://gis.stackexchange.com/questions/378557/gdalwarp-does-not-use-lanczo > s-resampling-on-image-with-alpha-channel/378569?noredirect=1#comment618912_3 > 78569 > > It

[gdal-dev] What is the purpose of -nosrcalpha in gdalwarp?

2020-11-08 Thread Rahkonen Jukka (MML)
Hi, I noticed this question from gis.stackexchange https://gis.stackexchange.com/questions/378557/gdalwarp-does-not-use-lanczos-resampling-on-image-with-alpha-channel/378569?noredirect=1#comment618912_378569 It seems that alpha band has some bad effect on the result of lanczos resampling and th