New answers tagged topology
If these are in the same layer this is pretty straigtforward. Simply tick the "Topological Editing" box in your snapping options. Then if the two polygons share a node, this node will be moved in both polygons.
If the endpoints of your segments are within 5000 km of each other, then pick some suitable midpoint (e.g., the point halfway between the 2 midpoints), and use this as the center of projection for GeographicLib's gnomonic projection. Map the two line segments into this projection and solve the resulting 2d intersection problem. This will give you a good ...
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