[gdal-dev] Build overviews and tile index

[Even Rouault]

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

> Thank's Even.
>

For the PamProxy, the best doc is probably to study the corresponding test in
the autotest suite :

http://trac.osgeo.org/gdal/browser/trunk/autotest/gcore/pamproxydb.py

Basically, it seems you just have to define the GDAL_PAM_PROXY_DIR environmenet
variable and then the .ovr files should be read from/written into it.

> 2012/7/12 Even Rouault <even.rouault at mines-paris.org>
>
> > Selon Saād 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.
> > >
> >
> >
> >
>