Hi,
I'm using MapServer 4.99 and trying to modify the processing directive for a raster layer dynamically using a CGI parameter. I want to let the user modify the min and max values used to scale the image. I've tried lots of different syntaxes for this without any success. Anybody know the trick? I've tried the following:

&map_layername_processing="scale=15000,17000"
&map_layername_processing="scale%3D15000%2C17000"
&map_layername_processing=scale%3D15000%2C17000
&map_layername_processing_0=/all of the above.../
&map_layername_processing_scale=15000,17000
&map_layername_processing_scale=15000%2C17000
&map_layername_processing_scale=15000+17000
&map_layername_processing_0_scale=/all of the above.../

Is this something that's not possible to modify dynamically? Thanks for any help!
Best Regards,
John Maurer

--
John Maurer
Web/Database Applications Engineer
National Snow and Ice Data Center (NSIDC)
University of Colorado at Boulder
http://cires.colorado.edu/~maurerj
------------------------------------
"Without geography, you're nowhere!"

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