Color Interpretation band problem

[Norman Barker]

Hi,

I have a problem with the way that GDAL interprets the colour interpretation of a TIF file.

If the colour interpretation is RGBA  e.g
Band 1 Block=320x1 Type=Float32, ColorInterp=Red
Band 2 Block=320x1 Type=Float32, ColorInterp=Green
Band 3 Block=320x1 Type=Float32, ColorInterp=Blue
Band 4 Block=320x1 Type=Float32, ColorInterp=Alpha

then everything works fine and (in my case) all 27 bands are returned with the correct data in
each band

If, however, the color interpretation is Gray, e.g.
Band 1 Block=96x8 Type=Float32, ColorInterp=Gray
Band 2 Block=96x8 Type=Float32, ColorInterp=Undefined
Band 3 Block=96x8 Type=Float32, ColorInterp=Undefined
Band 4 Block=96x8 Type=Float32, ColorInterp=Undefined

Then the first band is returned ok, but the rest of the bands are blank!

I can't easily change the colour mode of my tif files (I am using JAI), does anyone know a workaround,
I have to serve the tifs as Float32

Thanks,

Norman Barker