I'm not sure if this will work but give it a try. You might have to wait
for Thomas to response as he would know for sure.
OUTPUTFORMAT
NAME "GTiff"
DRIVER GDAL/GTiff
MIMETYPE "image/tiff"
IMAGEMODE RGB
EXTENSION "tif"
FORMATOPTION "INTERLACE=false"
FORMATOPTION "QUANTIZE_NEW=ON"
FORMATOPTION "QUANTIZE_FORCE=ON"
FORMATOPTION "QUANTIZE_DITHER=OFF"
FORMATOPTION "QUANTIZE_COLORS=256"
END
Also look at http://mapserver.org/mapfile/outputformat.html#outputformat
there are FORMATOPTIONs specific to GDAL/GTiff and GDAl/* that can be
passed to GDAL when the image is output.
-Steve W
On 4/14/2014 5:24 PM, Avi Blackmore wrote:
Hello,
I've been using Mapserver to (among many other things) classify rasters
for years. I would output GeoTIFFs in 8-bit, paletted mode using a custom
output format definition, which I defined as follows:
OUTPUTFORMAT
NAME "GTiff2"
MIMETYPE "image/tiff"
DRIVER "GDAL/GTiff"
EXTENSION "tif"
IMAGEMODE "PC256"
TRANSPARENT FALSE
END
This worked for years with versions of Mapserver ranging from 4.4 up to
5.6.
Recently, I decided to test an upgrade to 6.4, and I have found that
this no longer works. The imagemode declaration is ignored and coerced back to
RGB mode, which is unsuitable for our purposes.
What is the proper way to get Mapserver to output 8-bit palletted
GeoTIFFs using raster classification in 6.4? Or, is this no longer possible?
I hope not, because I really want to use 6.4 in production, it has some great
new features.
--
Avi Blackmore
Head Programmer/System Administrator
Agri ImaGIS Technologies, Inc.
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