[gdal-dev] Geotiff with bands of different type

[Martin Raspaud]

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Andrew Brooks skrev:
> On Tue, 10 Aug 2010 11:46:00 +0100, Martin Raspaud
> <martin.raspaud at smhi.se> wrote:
>> We have a satellite image in black and white, which show IR brightness
>> temperatures. The data is scaled between 0 and 255 for viewing, and
>> this is
>> packed in a geotiff file
>>
>> Now some users would like to have the true value of the brightness
>> temperature
>> embedded in the file also.
> 
> Maybe you can simulate something close by putting a scale and offset (slope
> and intercept) into the geotiff so you still display 8-bit values but a
> decent
> image viewer will also calculate the true values and give a pixel
> readout of
> the true value under the cursor. I say simulate because 8 bits may not give
> sufficient resolution.

Hmmm, that sounds like a sufficient solution indeed, very good idea, thanks.

Is there any scale/slope and offset/intercept tags defined in geotiff ?

Best regards,
Martin
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