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

[Andrea Peri]

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,

-- 
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Andrea Peri
. . . . . . . . .
qwerty àèìòù
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