Hello, I'm using *.vrt file that is built atop of COG rasters with internal mask (PER_DATASET) + external overview file *.vrt.ovr. These files are stored on Azure Blob Storage and I get access to them using /vsiaz scheme. I've found out that when I read data from this VRT GDAL does few requests to *.vrt.ovr to get data and lots of requests to TIFFs to extract a mask.
What are the ways to overcome this? I hope I can put mask into sidecar *.vrt.msk file. Is that correct? Is there a way to store a mask inside a *.vrt.ovr file? Thanks.
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