[gdal-dev] Fastest way of reprojecting from VRT ?

[Oyvind Idland]

In my case, I got a VRT consisting of about 20 GeoTIFFs, where each tile
has overviews in them.

I did write some sandbox code, and tried the gdalwarp tool. Both are
equally slow.

There are earlier posts related to this aswell.
Den 13. apr. 2012 13:36 skrev "Even Rouault" <even.rouault at mines-paris.org>
følgende:

> Selon Oyvind Idland <oyvind.idland at gmail.com>:
>
> > I am currently using GDAL 1.8.0, and have found that reprojecting VRT
> > datasets can be incredibly
> > slow (several minutes in my case). I believe there are bugs/tickets
> related
> > to this issue.
> >
> > I am only interested in reprojecting arbitrary datasets (or portions of
> it)
> > into a screen size window, on the fly.
> > What is the most optimal way of doing this ?
> >
> > Should I read the desired window first, and then reproject it ?
>
> There are many potential causes that could explain an excessive slowness.
> Without precise facts, it is hard to tell which strategy could improve
> that.
>
> >
> > - Oyvind
> >
>
>
>
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