Hello, I have a layer with a big polygon and another layer which is a grid (made of squares 10X10m). The grid is larger than the big polygon and cover it entirely. I want to keep only the squares of the grid contained in the polygon. I know how to intersect my two layers to select all the squares of the grid inside my "big polygon". The problem is on the border : I would like to select only the squares which 90% of their surface is contained in the big polygon. Is there any plug-in or another solution to do it easily? I hope somebody could help me, thank you for your answer,
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