[Qgis-user] Map georeference question

[Madry, Scott]

I'll pass this to them to give a try. Thanks!

________________________________
From: Werner Macho <werner.macho at gmail.com>
Sent: Wednesday, April 12, 2017 10:24:03 AM
To: Madry, Scott
Cc: qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] Map georeference question

Hi!

What about setting the "black areas" to Nodata? (or even converting
the black to real nodata values)
 Properties -> Transparency -> No data value : Insert the black value here ..

Or use the rastercalculator to get rid of the black

regards
Werner



On Wed, Apr 12, 2017 at 3:45 PM, Madry, Scott <madrys at email.unc.edu> wrote:
> Hello, QGIS gurus and friends.
>
>
> Some of my students are georeferencing historical maps in QGIS, and want to
> remove the black edge areas that appear after the raster arrays are warped,
> or at least make these and only these black areas completely transparent.
> Seems a simple task?  Thanks- Scott Madry, UNC Chapel Hill, USA
>
>
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