[gdal-dev] jpeg in tiff artifacts

[Brian Case]

matt,

jpeg is a lossy format. the nodata is ignored because those pixels are
no longer the same value as the nodata value.

You can add a mask band to the tiff but unfortunately aside from
gdalwarp and mapserver I don't think there is any other way to read it.

see http://docs.oam.osgeo.org/storage/creating.html

Brian





On Thu, 2011-06-16 at 10:20 -0700, Matt Wilkie wrote:
> Hello,
> 
> When I convert with gdal_translate and use jpeg compression in geotiff 
> format there is artifacting on the edges. It looks like nodata is being 
> ignored. Is there any way to avoid this? (and still use jpeg or 
> equivalent space-saving compression)
> 
> 
> 
> see attached.
>