Re: [gdal-dev] Warped VRT and overviews

2017-09-30 Thread Sean Gillies
Hi Even, On Fri, Sep 29, 2017 at 2:38 PM, Even Rouault wrote: > Hi Sean, > > > > > > > > It's been my understanding that GDAL's RasterIO (most current version) > uses > > > overviews when available, implicitly. Is this also true for VRTs and > warped > > > VRTs or is not true? > > > > Yes, it is

[gdal-dev] Warped VRT and overviews

2017-09-29 Thread Sean Gillies
Hi all, It's been my understanding that GDAL's RasterIO (most current version) uses overviews when available, implicitly. Is this also true for VRTs and warped VRTs or is not true? I ask because 1) in reading from a warped VRT (using vsicurl) I'm not seeing use of the overviews in the GeoTIFF sou