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I have a landcover layer with an attribute of the administrative region ("GEN"). I am looking for an expression in the field calculator to calculate the summarized area depending on the GEN-field value.

I know I could do it with dissolve tool or with group stats, but I would like to have the "GEN" area sum as a field value in my attribute table.

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  • Dissolve by name, calculate area, multi-to-single part, pole of inaccessibility, join attributes by location back to your original layer.
    – Erik
    Dec 8, 2020 at 14:54
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    Ah, I found it. I need this expression: sum("area",group_by:="GEN")
    – Enzo Baldini
    Dec 8, 2020 at 14:58

1 Answer 1

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I just need to use that handy expression in the Field Calculator:

sum("area",group_by:="GEN")
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