Fwd: [gdal-dev] Most optimal way of using tiles ?

[Saâd HESSANE]

---------- Forwarded message ----------
From: Saâd HESSANE <saad.hessane at gmail.com>
Date: Mon, 2 Apr 2012 15:56:27 +0200
Subject: Re: [gdal-dev] Most optimal way of using tiles ?
To: Oyvind Idland <oyvind.idland at gmail.com>

Hy,

you can use "gdaladdo --config COMPRESS_OVERVIEW [DEFLATE | JPEG]" to
create compressed overview.
And then you can use gdalbuildvrt or gdaltindex to build an index of the files.

2012/4/2, Oyvind Idland <oyvind.idland at gmail.com>:
> Hello,
>
> I got a huge dataset consisting of about 100 uncompressed TIFF's, each with
> size 12599 X 9449 pixels with RGB bands.
> Note, that the TIFF's are not georef'ed, instead there are .tfw's following
> each file. Also, since they are about 350 MB each,
> I guess converting them to a compressed format could speed things up (I/O).
>
> The "normal" approach would probably be to make a VRT dataset, and build
> overviews. However, building a an
> overview based on the entire VRT index seems a bit heavy in this case.
>
> Is it possible in some way to create compressed overviews (using gdaladdo)
> for each file, and
> then build a VRT based on these ? Will the VRT dataset utilize the
> generated overviews ?
>
>
> - oyvind
>