I want to manually trace over an existing map image to replicate the boundaries using QGIS. If this was an existing polygon and I need to split this into 3 separate polygons, I would take the existing outer boundary, and then I would have to manually trace the boundaries of the inner areas - as a polyline or region? How would I join the inner boundaries to the outer boundary, and then create the 3 separate polygons within the base map table? I hope I have explained this clearly?
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