I am using QGIS version 2.14.1 (Essen). I have symbols that I have classified according to certain value from one of the columns in my shapefile.
Is it possible to do a second classification according to a second column?
Basically, I am using data with road works and the deviations linked to roadworks. My first classification is according to the size of the roadwork and I would like the second one to be according to the type of deviation (for cars, pedestrians, buses, etc).
Best Answer
You can use Data defined override in combination with categorised symbology. With this approach you can do categorised symbology on one attribute and set some other parameter (line style, line width etc.) to change according to other attributes.
example on OSM road data:
"maxspeed" /10
). You can also useCASE WHEN condition THEN result ELSE result END
etc. For possible parameter values see Description.. in parameter context menu