[Mapserver-users] output to 1band 16 bit geotiff?

[Frank Warmerdam]

Vincent Schut wrote:
> Hi folks,
> 
> I'm using mapserver to rasterize some vector layers, which it is doing great 
> :)
> But, I would like to output more than 256 values, and prefereably directly to 
> geotiff format (1 band, 16bit unsigned int). I succeed to output geotiff as 3 
> band rgb color, or as 1 band (byte) but then the output values are not what I 
> assign in the 'color x x x ' statement in the classes, but the highest color 
> gets the highest value, or something similar. I'm rasterizing provinces which 
> all have a code, but the codes are not continuous; there are some gaps. Could 
> this be done, and how? E.g. I would like to have several classes, where I 
> define the color in the class as 'color [code] 0 0' or something like that, 
> and that as output I get a 1band geotiff, *not* pseudocolored/paletted but as 
> a byte/int band with the code values...
> 
> I tried several geotiff outputformat combinations (imagemode INT16, 
> formatoption BANDTYPE=Int16, etc) but with no avail...

Vincent,

There is no support in MapServer, GDAL or gd for indexed 16bit bit images ...
that is producing images with colormaps containing more than 256 colors.

Sorry,

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