[gdal-dev] GDAL(Technical support for Extracting Elevations

2020-11-08 Thread Nabil Adechoubou
Greetings, Our team decided to use GDAL in our code to support certain business requirements. Each time we do an analysis we need the elevation profile lines, our analyses run through 10,000s of such cases across a large area. Which means we need to extract these elevation profile lines 10,000s

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