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2

You can get the angle of the line at the start (end) of the line using the startAngle function and probably create an offset in pixels using some trigonometry. But it would probably be easier to create a custom function to do it (and donate it to the project to help others in the future).


1

The rendering engine in GeoServer cannot do callouts. It can happen, just needs someone to either contribute their time to the rendering engine, found in GeoTools, or sponsor a developer to do it on their behalf.


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