Hi Darmawan,

You're on the right track.

I am guessing that you are calling the getScaleX() method before the
map pane has been displayed for the first time. The world to screen
transform (an AffineTransform object) is not created until the pane is
displayed.

(Actually, your question makes me think it might be better to change
JMapPane so that the transform is created as soon as the map pane has
its size set and is connected to a map context with layers).

Michael

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