Hi,
if you are on Qgis version>=2.6, before adding new field, I think you can use 
"Case when" expression in label box to filter features falling in your waste 
feature. I don't have a computer to check right formula but you need st_within, 
$geometry and attribute functions. The advantage is that all we be processed 
automatically in one shot and be up to date if you add new features.

I haven't checked neither but I wonder if Mask plugin doesn't provide such 
feature (unless it's the reverse effect : just show labels inside).

Regards,
DelazJ

Envoyé depuis mon HTC

----- Reply message -----
De : "Nicolas Cadieux" <nicolas.cadi...@archeotec.ca>
Pour : <qgis-user@lists.osgeo.org>
Objet : [Qgis-user] Feature labels
Date : mar., juin 30, 2015 05:24

Hi,

You can add a column with 0 and 1 that can be used to hide individual labels.  
Look in the label option in the layer property and you will find it. 
Nicolas Cadieux M.Sc.

Les Entreprises Archéotec inc. 

8548, rue Saint-Denis Montréal H2P 2H2

Téléphone: 514.381.5112  Fax: 514.381.4995

www.archeotec.ca
On Jun 29, 2015 9:11 PM, "David Lane [via OSGeo.org]" <[hidden email]> wrote:

Hi
I have contours with labels provided by our geospatial service. To this 
landscape I wish to add a feature (a waste dump) which has its own contours. I 
can hide the contours underneath the waste dump, but the contour labels are 
clearly visible.
How can i hide them?
Regards
David Lane
0419 560 862
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