[Qgis-user] Placing random points

[Andrea Giudiceandrea]

Hi Sebastien,
in addition to the suggestion given by Nyall Dawson, I would suggest you 
using the "Random points in layer bounds" algorithm: you just need to 
specify the total number of random points to be generated. The resulting 
layer will contain the specified number of points and such points will 
fall inside the polygons.

It seems to me that the "Random points in extent" algorithm, suggested 
by Chris Hermansen, may not be suitable for your needs: while the 
resulting layer will contain the specified number of points, such points 
will fall inside the extent of the layer containing the polygons, so it 
is not guaranteed that such points will actually fall inside the polygons.

Best regards,

Andrea Giudiceandrea