Creating colourmaps for all colour bands of GeoRaster maps

Dear all
Is there away of creating a colourmap that applies to all three colour bands of a colour image so that one can then adjust the alpha channels for the complete images as opposed to just one band? I am trying to create semi transparent GeoRaster maps using colourmap alpha channels. Reading the following thread, How to display transparent georaster on Oracle Maps? it states that colourmaps can only be applied to one layer (band). Is there a way of creating one layer based on three bands?
Although in another recent forum thread I started Joao recommend upgrading to MapViewer 10.1.3, as that has better and easier to use transparency options, this is not possible in the short term since the server that MapViewer runs on would need to be upgraded. I need to complete the work before this is likely to happen.
Kind regards
Tim

Hello, Andy and welcome to the Discussions.
I would suggest that you ask for assistance in the developer forums to which you have access as a member of Apple's iOS developer's program:
http://developer.apple.com/devforums/
You'll be much more likely to get assistance there, particularly with such a very specific issue. This forum is really for people using the iPhone rather than for people developing for it.
Regards.

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Creating colourmaps for all colour bands of GeoRaster maps

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