I have new question, how can i change lable on axis for example instead 90 degree would be North.
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I have new question, how can i change lable on axis for example instead 90 degree would be North.
Derive from QwtRoundScaleDraw and overload QwtRoundScaleDraw::label(). Then pass you scale draw object with plorGrad->setAzimuthScaleDraw().
Uwe