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<p>I'll pass this to them to give a try. Thanks!</p>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Werner Macho <werner.macho@gmail.com><br>
<b>Sent:</b> Wednesday, April 12, 2017 10:24:03 AM<br>
<b>To:</b> Madry, Scott<br>
<b>Cc:</b> qgis-user@lists.osgeo.org<br>
<b>Subject:</b> Re: [Qgis-user] Map georeference question</font>
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<div class="PlainText">Hi!<br>
<br>
What about setting the "black areas" to Nodata? (or even converting<br>
the black to real nodata values)<br>
Properties -> Transparency -> No data value : Insert the black value here ..<br>
<br>
Or use the rastercalculator to get rid of the black<br>
<br>
regards<br>
Werner<br>
<br>
<br>
<br>
On Wed, Apr 12, 2017 at 3:45 PM, Madry, Scott <madrys@email.unc.edu> wrote:<br>
> Hello, QGIS gurus and friends.<br>
><br>
><br>
> Some of my students are georeferencing historical maps in QGIS, and want to<br>
> remove the black edge areas that appear after the raster arrays are warped,<br>
> or at least make these and only these black areas completely transparent.<br>
> Seems a simple task? Thanks- Scott Madry, UNC Chapel Hill, USA<br>
><br>
><br>
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