QGIS update feature geometry from attribute fields

Question

I know how to get the geometry (x,y) into attribute fields with the calculator, but I can't figure out how to update the geometry from values contained in attributes.

I am trying Field Calculator > Update existing field > , but I can't find how to assign my "x" and "y" fields to the actual feature geometry.

I don't want to manually drag each point with the vertex editor, or type in each coordinate. I have to update many points.

Kazuhito · Accepted Answer

Assuming you have chosen <geometry> field in the Update existing field drop down list, the expression you need would be:

geom_from_wkt('POINT('||"x"||' '||"y"||')')

hillibilli · Answer

I modified this a bit to move a selection of points into a spread out line along a vertical axis.
geom_from_wkt('POINT('||$x||' '||((@row_number*100)+$y)||')')
The 100 can be changed to whatever is appropriate for your area and scale.  I imagine that this could be further modified to create a grid, but I didn't have time to try.

QGIS update feature geometry from attribute fields

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