lundi 29 décembre 2014

Select two exact features and sum their values to a third features attribute row - QGIS


I have a polygon layer which contains square areas. In odd columns, there is a value for all polygons and no values in even columns. I would like to fill up the empty fields with a value that is the sum of two neighbouring areas. How can I select two exact features and sum their values to a third features attribute row?





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