Thanks Brad, I didn't notice your response as my e-mail system flagged it junk email.
We'll try this and report back with our findings. Thank you again for the help, Raymond. ________________________________ From: Brad Hards <br...@frogmouth.net> Sent: Tuesday, September 28, 2021 7:21 PM To: gdal-dev@lists.osgeo.org <gdal-dev@lists.osgeo.org> Cc: Chastain, Raymond Lee (MU-Student) <rlc...@mail.missouri.edu> Subject: Re: [gdal-dev] Blue artifact dots in shadows when using GDAL to create mosaics WARNING: This message has originated from an External Source. This may be a phishing expedition that can result in unauthorized access to our IT System. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email. On Wednesday, 29 September 2021 9:37:57 AM AEST Chastain, Raymond Lee (MU- Student) wrote: > Process is very simple > > 1. Take our tiles and build a virtual raster: > gdalbuildvrt -r lanczos -resolution HIGHEST output.vrt -input_file_list > input_file_list.txt 2. Convert our virtual raster to a GeoTIFF: > 3. gdal_translate -of GTIFF ./output.vrt ./output.tif I manually removed the NODATA part from the vrt, and it looks better. Possibly the nodata value in the source is bad? Or you need to put something more meaningful behind the images... Brad
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