View source for Cloud masking

= Apply the cloud and cloud shadow mask to a Sentinel-2 multiband file =
* Create a polygon with the extent of the Sentinel-2 image: [[Create image extent polygon]]. 
* {{mitem|text= Vector --> Geoprocessing Tools --> Symmetrical difference}}. Input layers are the image extent and the merged cloud and cloud_shadow polygons.
[[File:Qgis_vector_symdiff.png|400px]]
* Apply the output vector layer '''cloud_cloudshadow''' as mask to the multiband Sentinel-2 image file. {{mitem|text= Raster --> Extraction --> Clip Raster by Mask Layer}}.