[Gvsig_english] transparent raster

[Nacho Brodin]

Hello, 
You can make a colour or colour range transparent selecting "Transparency" in 
the dialog "Raster Properties". In this dialog you have to insert a  value 
for each value R,G,B and add this to the list (255, 255, 255 make the white 
transparent). When you press Apply or Accept these pixels will turn 
transparent in the view. 

Regards
Nacho Brodin.

El Lunes 11 Diciembre 2006 22:49, Michele Zucali escribió:
> dear gvSIGers,
>
> 	I'd like to use some black/white geoTIFF above .shp poligonal
> layers, which are filled by various colors.
> In order to see the underling layers I need to have a transparent
> raster.
>
> How to make the raster transparent (i.e. make the white transarent) ?
> I did try using the transparent property to geotiff but it does not
> work or, better, I'm not able to make it working.
>
> ciao
> Michele
>
>
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