[gdal-dev] How create a simplified raster from an uge raster dataset

[Saâd HESSANE]

Hi,

Try build a tileindex : http://www.gdal.org/gdaltindex.html
It's really useful with big tiled dataset.

Best regards.


2012/4/30 Andrea Peri <aperi2007 at gmail.com>

> Hi,
> I have a huge set of tiffs rasters.
> Any single tiff is a geotiff tiled (256x256) and as an internal overview.
>
> To can use this raster dataset to lower scales (full extension) I need to
> create a single simplified tiff raster of all this dataset.
> Now I need to create a single simplified tiff raster .
>
> I don't know how is the better way to produce this simplified raster.
> This because the original huge set of rasters are about 2 TB. Every raster
> is about 15000 x 15000 px.
>
> SO I start creating a catalog named "cat_fogli.vrt" using gdalbuildvrt.
> And after this was create, I tryed to produce an external overview of this
> catalog.
> using this command:
>
> gdaladdo -r average -ro --config BIGTIFF_OVERVIEW YES cat_fogli.vrt 256
> 512 1024 2048 4096
>
> Unfortunately gdaladdo seem to be lock. It is take really many time and is
> always on 0%.
>
> I don't know if is only a bug time due to the huge size of original raster
> dataset or I'm using the wrong way.
>
> Thx,
>
> --
> -----------------
> Andrea Peri
> . . . . . . . . .
> qwerty àèìòù
> -----------------
>
>
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