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<div class="moz-cite-prefix">On 09-03-17 11:03, Bernd Vogelgesang
wrote:<br>
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Am 09.03.2017, 08:28 Uhr, schrieb Neumann, Andreas
<a class="moz-txt-link-rfc2396E" href="mailto:a.neumann@carto.net"><a.neumann@carto.net></a>:<br>
<br>
<blockquote style="margin: 0 0 0.80ex; border-left: #0000FF 2px
solid; padding-left: 1ex">
<p>Hi Hilpers,</p>
<p>Is this about label and symbol backgrounds?</p>
<p>We have a QEP about that (see <a moz-do-not-send="true"
href="https://github.com/qgis/QGIS-Enhancement-Proposals/issues/63">https://github.com/qgis/QGIS-Enhancement-Proposals/issues/63</a>) and
an offer from Oslandia.</p>
<p>Can you please review this QEP and let us know if it matches
your needs?</p>
<p>If yes - would you be able to contribute financially? It is
quite complex to implement this and I have to collect around
18k € to finance it. So I would be interested in financial
contributions.</p>
<p>Thank you for your reply,</p>
<p>Andreas</p>
<p> </p>
</blockquote>
<div><br>
</div>
<div>Hi Andreas,</div>
<div>as I understood the feature request, he means a "real" mask
that is not only masking the display, but all features outside
of the mask for any geoprocessing.</div>
<div>I faintly rember this from ArcGIS which I didn't use for
ages, so I have no idea how well this is working how its done
technically.</div>
<div><br>
</div>
<div>But the idea, that when working with numerous layers of
different extent, not to have to crop them them each
individually to fit into a window of interest, but just to
assign a mask layer/bbox to them, sounds very good to me.</div>
</blockquote>
<br>
This sounds like the mask (r.mask) in GRASS GIS and region
(g.region) functionality (limits raster operations to defined bbox,
amongst others), which both are indeed incredible useful functions.
If you want to use this for geoprocessing in QGIS, you can try it
out using the GRASS toolbox. The mask function is also available in
the processing toolbox (r.mask.rast; never tried out how this works
though). Note that r.mask and g.region both only work for rasters. A
similar functionality for vector layers would be great, but perhaps
more complicated to implement (I guess internally it would still use
a mask to cut out the desired area / region).<br>
<br>
<blockquote cite="mid:op.ywtvkxsyl2i25i@bernd-pc" type="cite">
<div><br>
</div>
<div>Cheers</div>
<div>Bernd</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
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<p>On 2017-03-08 21:08, hilpers wrote:</p>
<blockquote type="cite" style="padding: 0 0.4em; border-left:
#1010ff 2px solid; margin: 0">
<div class="pre" style="margin: 0; padding: 0; font-family:
monospace">Hello everyone,<br>
<br>
I regularly face the issue that I want to set masks for
layers of my choice<br>
based on one layer´s geometry.<br>
I know there is a plugin available which handles labels *but
not* the<br>
geometry of layers to be masked.<br>
<br>
In my oppinion a mask should make geometries / raster cells
outside the<br>
specified mask disappear. The user should also be able to
exclude layers<br>
from being masked. After searching for more than a year, I
want to ask how<br>
you handle this pretty common scenario. Furthermore, four
years after the<br>
last discussion about masks here on QGIS Nabble I also want
to ask, whether<br>
developers are planning to incorporate this feature in V3. <br>
<br>
It would be great to have that masking capability option
within the layer<br>
options or even the projects settings.<br>
<br>
Thanks <br>
<br>
<br>
<br>
--<br>
View this message in context: <a moz-do-not-send="true"
href="http://osgeo-org.1560.x6.nabble.com/Real-Mask-functionality-in-QGIS-tp5311464.html">http://osgeo-org.1560.x6.nabble.com/Real-Mask-functionality-in-QGIS-tp5311464.html</a><br>
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Nabble.com.<br>
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</blockquote>
<p> </p>
<div> </div>
</blockquote>
<br>
<br>
<br>
<div id="M2Signature">
<div>-- </div>
<div>Bernd Vogelgesang<br>
Siedlerstraße 2<br>
91083 Baiersdorf/Igelsdorf<br>
Tel: 09133-825374</div>
</div>
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