[FWTools] Image Quality - Image Preprocessing

Travis Kirstine traviskirstine at gmail.com
Wed Mar 4 09:54:14 EST 2009

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

Travis K.

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

More information about the FWTools mailing list