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I imported a delimiter text layer in QGIS with 4 columns (lon,lat,angle,norm). My goal is to show these points with a specific symbol (an arrow), oriented accordidng to the angle field.

I think I found the right tool from another post: https://gis.stackexchange.com/questions/216987/rotate-marker-symbols-individually-in-qgis#:~:text=This%20is%20how%20it%20is,Symbology%20tab%20%3E%20Advanced%20%3E%20Rotation.

However the symbol with the original orientation is kept (arrow pointing to the North).

Could someone help me understand how to get rid of this symbol?

enter image description here

EDIT :

PolyGeo
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Alyson LE QUILLEUC
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    From what you show only the rotated symbol should appear. Don't you have a duplicate of the layer in your map? – Kasper Jan 11 '23 at 15:53
  • I checked but it is not the case... – Alyson LE QUILLEUC Jan 11 '23 at 16:28
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    Then maybe there are duplicates in your data, same position, different angles ? Sait-on-jamais – Kasper Jan 11 '23 at 17:09
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    Do you have multiple symbol layers? – BERA Jan 11 '23 at 17:50
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    I suspect @Kasper's theory of "same position, different angles" is right. You can check by selecting one of your points (by dragging, rather than clicking) then look in the attribute table to see how many features are actually selected. – Matt Jan 11 '23 at 18:32
  • Thank you for your answers ! I tried to move one point and it was dragged away from the arrow pointing North, as if there were duplicates in my dataset indeed ! However, I don't understand why I have duplicates or how to solve this issue. I only have one shapefile layer with the four fields (X,Y,angle,norm) as mentionned before... (I added a screenshot to the original post) – Alyson LE QUILLEUC Jan 12 '23 at 08:10

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