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I’m trying to create a new polygon with 30% of the area of another one. After creating it manually using snapping and reshape features, I use the Difference tool from the Vector menu to generate a difference polygon between the two.

However, there are leftover lines in the resulting vector. Is there anything I can do to avoid this?

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  • See: gis.stackexchange.com/questions/480057/… , and the linked+related questions to the right Commented Sep 17 at 5:02
  • Difficult to guess what went wrong when creating the data... And difficult to say what you want to achieve. Just asking: why do you snap the 2nd polygon to the first one, if the role of the 2nd polygon is only to clip the first one? You could draw to 2nd polygon overlapping the first one, but going beyond it, to be sure to catch all vertices. Commented Sep 17 at 6:17
  • Thank you for replying to my post. To answer your question, I manually created the second polygon "Recorte_apagar". I’m trying to extract 30% of the area from the "perímetro". I also tried using the intersection function from the Vector menu: I created a polygon beyond the limits of the "perímetro", but I ran into the same issue with leftover lines. On top of that, the polygon created by the tool was shifted by about 1 cm. link italic bold code Commented Sep 17 at 16:41
  • link Commented Sep 17 at 16:59

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