[FWTools] Image Quality - Image Preprocessing

[Travis Kirstine]

We are running mapserver connected to a tilecache delivering high
resolution orthophoto to a google maps.  The problem I am having is
that we preprocess all our imagery using reduced resolutions at higher
scales and full resolution at lower scales.  In the past we have used
gdal_merge with - ps 10 10  to merge tile into larger overalls and
downsampling  the resolution but we have found that the image quality
was not adequate.  I have been experimenting with gdalwarp using the
different resampling methods with varied results.  Is there any
consensus on which resampling method provided with gdal provide the
optimal results (from a viewing perspective) when downsampling imagery
data?

-- 
Travis K.

Toronto, Canada
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"She knows there's no success like failure
And that failure's no success at all."
-Bob Dylan-
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