[Qgis-user] Placing random points

[Andrea Giudiceandrea]

> chris hermansen clhermansen at gmail.com
> Fri Mar 24 20:16:59 PDT 2023

> I believe I was the one who suggested the layer bounds approach.

Hi Chris, probably there was a misunderstanding.

IIRC, you suggested to use the "Random points in extent" algorithm. 
AFAIK this algorithm places the random points inside a rectangular (in 
the CRS Cartesian plane) extent, e.g. the rectangular extent of the 
layer containing the polygons, so it is not guaranteed that such random 
points will actually fall inside the polygons as the can fall inside the 
rectangular extent but outside the polygons. Using this algorithm it is 
not guaranteed that such random points will actually fall inside the 
polygons even if the polygons are dissolved.

Instead, using the "Random points in layer bounds" algorithm, the 
resulting layer will contain the specified number of points and such 
random points will always fall inside the polygons even if the polygons 
are not dissolved.

Best regards.

Andrea