[Qgis-user] Real Mask functionality in QGIS?

Thu Mar 9 02:23:32 PST 2017

Although QGIS has no convenient mask utility, the underlying logic (that ArcGIS uses too) is of course standard geo-processing: Create the mask geometry, use it as an overlay to "cut away" the masked areas from your layers-to-be-processed and then do you processes on those geometries...

--
Barend Köbben
Senior Lecturer – ITC-University of Twente
PO Box 217, 7500 AE Enschede (Netherlands)
ITC Building (room 1-065)
@barendkobben
+31-(0)53 4874 253

On 09/03/17 11:07, "Qgis-user on behalf of Tobias Wendorff" <qgis-user-bounces at lists.osgeo.org on behalf of tobias.wendorff at tu-dortmund.de> wrote:

    Sorry for FQ

    In ArcGIS you can limit processing by mask, extent and query.

    -- 
    Von einem iPhone gesendet und wird daher Fehler enthalten…

    Am 09.03.2017 um 11:03 schrieb "Bernd Vogelgesang" <bernd.vogelgesang at gmx.de>:

    Am 09.03.2017, 08:28 Uhr, schrieb Neumann, Andreas <a.neumann at carto.net>:

    Hi Hilpers,
    Is this about label and symbol backgrounds?
    We have a QEP about that (see 
    https://github.com/qgis/QGIS-Enhancement-Proposals/issues/63 <https://github.com/qgis/QGIS-Enhancement-Proposals/issues/63>) and an offer from Oslandia.
    Can you please review this QEP and let us know if it matches your needs?
    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.
    Thank you for your reply,
    Andreas

    Hi Andreas,
    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.
    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.

    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.

    Cheers
    Bernd

    On 2017-03-08 21:08, hilpers wrote:
    Hello everyone,

    I regularly face the issue that I want to set masks for layers of my choice
    based on one layer´s geometry.
    I know there is a plugin available which handles labels *but not* the
    geometry of layers to be masked.

    In my oppinion a mask should make geometries / raster cells outside the
    specified mask disappear. The user should also be able to exclude layers
    from being masked. After searching for more than a year, I want to ask how
    you handle this pretty common scenario. Furthermore, four years after the
    last discussion about masks here on QGIS Nabble I also want to ask, whether
    developers are planning to incorporate this feature in V3. 

    It would be great to have that masking capability option within the layer
    options or even the projects settings.

    Thanks 

    --
    View this message in context: 
    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>
    Sent from the QGIS - User mailing list archive at Nabble.com <http://Nabble.com>.
    _______________________________________________
    Qgis-user mailing list
    Qgis-user at lists.osgeo.org
    List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
    Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

    -- 
    Bernd Vogelgesang
    Siedlerstraße 2
    91083 Baiersdorf/Igelsdorf
    Tel: 09133-825374

    _______________________________________________
    Qgis-user mailing list
    Qgis-user at lists.osgeo.org
    List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
    Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user