On 2013-11-07 17:41, Kurt Roeckx wrote : > But it's not only rivers. Roads are often also the border and > might later be widened, straighten out and so on. > > You can do 2 things when currently mapping them and you don't have > official coordinates: > - Re-use the existing nodes, nodes end up in 2 ways > - Use other points for them, they don't share nodes > > In the first case you of course need to be careful when moving > such a node. But we might not know better where the border really > is so it's often easier to map re-use the nodes. ? I remember having read on this list that Belgian boundary nodes must not be shared with roads, landuse, etc. But it's probably not written in the wiki. I agree with this decision, the principal reason being that the very kind guy who has mastered tagging roads is usually not aware of the intricacies of boundaries and of the consequences of modifying or deleting one of their nodes. He's probably using Potlatch which is not the ideal tool to warn that something dangerous is being done and help doing it. On the German border, there are no less than 6-8 ways and relations on the same line. Someone managed to add a path and 3 landuse to that, if I recall well, in which Osmose detected an error. I refused to touch at that stack. A few days ago, I removed 2 pedestrian crossings that were standing alone on the Brussels' boundary. The most surprising is those ways that cross a boundary at a right angle and share a node with it. You can see here a gate to which the Belgium-Netherlands boundary is attached <http://www.openstreetmap.org/browse/node/2156401570>. The form of the boundary seems to show that the gate was pulled towards Belgium to extend the Dutch territory. And there was no La Libre article nor Parliament session in this case ;-)
Cheers, André.
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