[Qgis-user] hide vector under raster?

[Nicolas Cadieux]

Hi,

If you are having crashes, try on 2.18 to see if you have the same problem.  Are you using on the fly reprojection?  If your vector file is not in the same format as the raster, the reprojection is probably taking all the time.  Try saving in an other format like spatialite that is more efficient than shp.  Copy the file on a local disk and not a file server.  Make a new project with only the raster and the vector files to make try and isolate the crash problem.  Disable all plugins.

Perhaps the control rendering order in the layer order panel can help?  Not sure, I don’t use that.

Nicolas

> Le 29 mai 2018 à 09:00, Tobias Wendorff <tobias.wendorff at tu-dortmund.de> a écrit :
> 
> Hi Bernhard,
> 
> Am Di, 29.05.2018, 14:42 schrieb Bernhard Ströbl:
>> 1) You have a vector layer with _many_ features
> 
> Exactly.
> 
>> 2) You do not want to have it rendered because it takes so long to render
> 
> Exactly.
> 
>> 3) You want to query this layer
> 
> Exactly.
> 
>> 4) When you zoom out QGIS crashes when using the no symbols renderer
> 
> Actually, it doesn't crash because of no symbols renderer. It just
> takes so long to load the vector data that QGIS doesn't respond
> anymore. When I click somewhere into QGIS after 10-15 minutes, Windows
> told me that the app crashed and that I have to restart it.
> 
>> Questions: What kind of layer is this: DataProvider? geometryType?
> 
> 24 shapefiles, polygon grid with 100 x 100 meters
> 
>> Which version of QGIS are you using?
> 
> QGIS3 (tested stable release and nightly)
> 
>> Does QGIS crash when zooming out while you use a simple renderer?
> 
> Same behavior: it doesn't respond after some minutes.
> There's no difference between no symbols and simple renderer.
> 
> Best,
> Tobias
> 
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