Maybe it's related to the fact I was preventing creation of *.aux.xml files with export GDAL_PAM_ENABLED=NO Currently investigating -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/gdal-retile-and-nodata-tp5079895p5083086.html Sent from the GDAL - Dev mailing list archive at Nabble.com.