In QGIS there is an option to rotate the north arrow as grid north or true north. For my case I need the true north angle. The rotation works just fine but now I also wanted to add the image rotation of said north arrow as a text label. Now I wondered if I can query the value which is actually displayed inside the item properties of the north arrow.
Up to now I tried grabbing it using
item_variables('northarrow') with no success. Furthermore I tried using a python function in the label expression utilizing
bearingTrueNorth() which looks as following:
from qgis.core import * from qgis.gui import * @qgsfunction(args='auto', group='Custom') def truenorth(value1,feature,parent): crs=QgsCoordinateReferenceSystem.fromEpsgId(4326) transformContext=QgsCoordinateTransformContext() bearing=bearingTrueNorth(crs,transformContext, QgsPointXY(value1)) return bearing
I tried various iterations but to no avail. My
value1 is as QgsGeometry grabbed by using
Is there any known solution to this?