I want to appropriate line segments that share the same geometry with a particular line width and labels based on the aggregated values of one field
"BUSLINIE" means a bus line,
"Overlap" means if the line has overlaps, i.e. it's geometry repeats.
Values of the field
"GIS@BUS_5_Min" for these three objects has to be aggregated as one value and represented as a label
And the width of this line (selected in yellow) will be
sum("GIS@BUS_5_Min")/100 = 19.10/100 = 0.1910
How can I achieve such output?
Is it particularly an example of a flow map?
I assume it is possible with
Layer Properties > Width > Data defined override > Edit..., but I do not know how to check the same geometry and how to sum the values of certain features with
CASE WHEN condition THEN result END conditional function?
Dissolve function does not work in my case because I do not have any key-fields.