AW: [gdal-dev] How to create TIFF with overview from a TMS server ?

[Jean-Claude Repetto]

Le 20/01/2011 13:57, C.Strobl at dlr.de a écrit :
>
> maybe it is easier to try something like this after gdal_translate
>
> gdaladdo -r average my_iamge.tif 2 4 8 16
>

Hi Christian,

Thanks for your answer. Unfortunately, it is not what I want, not at all.

For example, if the base map is composed of these four tiles :
http://c.tile.openstreetmap.org/17/68090/47886.png
http://c.tile.openstreetmap.org/17/68091/47886.png
http://c.tile.openstreetmap.org/17/68090/47887.png
http://c.tile.openstreetmap.org/17/68091/47887.png

I want that the overview looks like :
http://a.tile.openstreetmap.org/16/34045/23943.png

It is completely different from an average of the four tiles.

Regards,
Jean-Claude