provider.addAttribute $area

Asked Mar 15 '16 at 10:19

Active Oct 29 '21 at 08:30

Viewed 24 times

I'm trying to add the attribute $area. I made a intersection and Tot_aera isn't the good one, so I want to add a new.

I made that :

from PyQt4.QtCore import *
try:
    if ind==-1:
        if caps & QgsVectorDataProvider.AddAttributes:
            res=provider.addAttributes( [ QgsField(nameattr,QVariant.Double) ] )
except:
    print "FALSE"

So I have a new attribute but NULL. So my question : How put "$area" in nameattr?

edited Oct 29 '21 at 08:30

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asked Mar 15 '16 at 10:19

Kwentinus

5

Hi, addAttribute only creates a new field, it doesn't fill it. I suggest you have a look at this post: Add area column using PyQGIS. – ArMoraer Mar 15 '16 at 10:24

provider.addAttribute $area

0 Answers0