2012/7/4 Jan Tappenbeck <o...@tappenbeck.net>:
> Hi!
>
> i have transform rasterimage by gdal to an other coord-system. now i load
> the rasterimages into qgis and the black-border-triangle overlayer
> informations in other images.
>
> the border-triangle are with alpha-information and the mapserver option
> OFFSITE 251 250 249 allow to make the border-triangle transparency.
>
> is it possible to make this even in qgis?

I can make corners transparent in single band rasters reprojected on
the fly this way: go to "Layer properties", "Transparency" tab, in the
"Transparent pixel list" create a new entry, then set the "Gray"
column to the "No data value" shown in the upper right.

Hope this helps.

Goyo
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