[gdal-dev] gdal_merge vs gdal_translate for reducing resolution

[John Mitchell]

Hi,

I have tried running both gdal_merge and gdal_translate for reducing the
resolution of individual tiles and I have found that both the data quality
and speed for the conversion are identical.  Since everything is identical
is their any reason to prefer one program over the other for reducing
resolution?

Also if what is the preferred method as far as data quality is concerned
where you want to have multiple passes at reducing the resolution as an
example:

method 1
2x resolution: 1/2 of full resolution
4x resolution: 1/4 of full resolution
8x resolution: 1/8 of full resolution
16x resolution: 1/16 of full resolution

method 2
2x resolution: 1/2 of full resolution
4x resolution: 1/2 of 2x resolution
8x resolution: 1/2 of 4x resolution
16x resolution: 1/2 of 8x resolution

Thanks,

-- 
John J. Mitchell
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/gdal-dev/attachments/20080121/01174932/attachment.html