[gdal-dev] Performance issues with gdal vrt

[Craig Leat]

Hi Even

Thanks for your valuable comments. If I understand you correctly I can
either access the overviews in the tiles by hand crafting vrt files
for each overview level or sacrifice disk space and generate external
overviews using your gdalwarp trick [1].

A comment from Frank [2] back in 2005 confuses me. He mentioned
VRTSourcedRasterBand in the context of overviews in the tiles, but I
only know of VRTRasterBand [3].

Thank you for any further comments,

Craig

[1] http://lists.osgeo.org/pipermail/gdal-dev/2009-May/020640.html
[2] http://lists.osgeo.org/pipermail/gdal-dev/2005-November/007066.html
[3] http://www.gdal.org/gdal_vrttut.html