[gdal-dev] Build overviews and tile index

[Even Rouault]

Selon Saâd HESSANE <saad.hessane at gmail.com>:

> Hi list,
>
> I'm workig on a Mapserver/GDAL application, and I have to setup the
> datasource (create tileindex and overviews) to boost the performance.
>
> I have two question :
>
>    1. Can I store overviews in a different path than the original raster
>    path? The original path can be in a read only folder like an optical disc.

This should be possible by using the GDAL PamProxy mechanism, but I'ma afraid
this is very lightly documented. See http://trac.osgeo.org/gdal/ticket/2432 for
some elements.

>    2. Can I build overviews of an entire VRT tile index ?

gdaladdo on a VRT should work.

>
> Thank you.
>