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Thanks Brad,<br>
<br>
I didn't notice your response as my e-mail system flagged it junk email.<br>
<br>
We'll try this and report back with our findings.<br>
<br>
Thank you again for the help,</div>
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Raymond.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Brad Hards <bradh@frogmouth.net><br>
<b>Sent:</b> Tuesday, September 28, 2021 7:21 PM<br>
<b>To:</b> gdal-dev@lists.osgeo.org <gdal-dev@lists.osgeo.org><br>
<b>Cc:</b> Chastain, Raymond Lee (MU-Student) <rlc5m8@mail.missouri.edu><br>
<b>Subject:</b> Re: [gdal-dev] Blue artifact dots in shadows when using GDAL to create mosaics</font>
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On Wednesday, 29 September 2021 9:37:57 AM AEST Chastain, Raymond Lee (MU-<br>
Student) wrote:<br>
> Process is very simple<br>
><br>
> 1. Take our tiles and build a virtual raster:<br>
> gdalbuildvrt -r lanczos -resolution HIGHEST output.vrt -input_file_list<br>
> input_file_list.txt 2. Convert our virtual raster to a GeoTIFF:<br>
> 3. gdal_translate -of GTIFF ./output.vrt ./output.tif<br>
I manually removed the NODATA part from the vrt, and it looks better. Possibly<br>
the nodata value in the source is bad? Or you need to put something more<br>
meaningful behind the images...<br>
<br>
Brad<br>
<br>
<br>
<br>
<br>
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