I extracted nodes from polygon parcel layer by Geometry Tools > Extract Nodes. However there are many crossed unnecessary points with same location after extracted nodes. There is a topic like this: Join attributes by location

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Is there any way to simplify unnecessary points?

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    Do you need the attributes of each overlapped point? Otherwise, you could use the Delete duplicate geometries to remove all points at the same location (this will leave you with the last point in your attribute table). – Joseph Jul 23 '15 at 10:24
  • The answer posted by @gcarrillo here is a good method if you need the individual attributes. – Joseph Jul 23 '15 at 10:59
  • Thanks. I will try those methods. Attribute info is not important, just x,y is important for this. – Edip Ahmet Jul 23 '15 at 12:18
  • I solved this problem via SAGA's Remove Duplicated Points. – Edip Ahmet Jul 23 '15 at 16:51
  • Awesome! You should post your solution as an answer to close this question off :) – Joseph Jul 24 '15 at 9:19

I solved this problem via SAGA's Remove Duplicated Points.

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