Hi, I have been really impressed with how QGIS can quickly display a vrt of say, a bunch of tifs, when the underlying tifs have overviews already created. I was curious how it is going about accessing the overviews of the underlying imagery, as the gdal api doesn't seem to think the vrt has overviews or subdatasets, and QGIS itself doesn't mention the vrt having overviews.
Can anyone illuminate this for me? Thanks! -Patrick
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