Very cool. Looks like it is scheduled for inclusion in Release 5.4., and even better, the code is still functional. I'm playing around with it now, and am easily applying a gradient to a single range of values, but have not yet figured out how to apply different color gradients to different ranges.
Will keep working on it. Thanks for the lead. -- On Tue, Jan 13, 2009 at 2:02 PM, Frank Warmerdam <[email protected]>wrote: > Roger André wrote: > >> This is probably a question for Frank W.. I'd like to re-write the raster >> classifier in Mapserver so that it can apply a linear color gradient using >> LUTs. I've got code written already to do this with the Python API to GDAL, >> and would like to be able to do the same thing in Mapserver. Can someone >> point me to the right C code? >> > > Roger, > > The core of the existing classification logic is msGetClass() in > mapraster.c. > Also if you search on "classified" in mapdrawgdal.c you will see most > of the places it gets used. > > I believe that ramp based gradients should be written up as an RFC. There > was a previous effort which I think was partially implemented. I would > suggest you dig up information on it, before going too far. > > http://mapserver.org/development/rfc/ms-rfc-6.html > > Best regards, > -- > > ---------------------------------------+-------------------------------------- > I set the clouds in motion - turn up | Frank Warmerdam, > [email protected] > light and sound - activate the windows | > http://pobox.com/~warmerdam<http://pobox.com/%7Ewarmerdam> > and watch the world go round - Rush | Geospatial Programmer for Rent > >
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