Yep! Girls skirts)) Unusless framekeepers stuff. But I think I resolved neighboring. Two nodes are neighbors becouse they both have the same geographical oposite sides coordinates. Every quad of terrain has a geographical extent. And if forexample right side of node A equals left side of the node B then A kith B on the east! Its realy works!
I'm thinking about same problem. What if is there an algorithm to determine two nodes common side? If you know common side(west, east, etc..)and you know node's LODs then make a stitching them. Oh, man, if i'd know this algorithm..., please help.