Quite a number of times I've noticed a single way having the tag boundary=administrative (I assume having come from the Australian ABS import and being part of a larger relation marking some town or suburb) but also having waterway=stream (for example http://www.openstreetmap.org/browse/way/38128067).
My interpretation of the "One feature, one OSM-object" suggestion would be that this is bad because the single way is being used for two different purposes (representing a river, and representing an administrative boundary). Because then you don't know which tags refer to the river feature and which to the administrative boundary feature. I would guess that the correct thing to do is have two different ways which share the same nodes, one for the river and another for the boundary. But I don't know how to duplicate an existing way like this in JOSM. If this is the agreed upon thing then it would be great if someone could run a script that split the waterway tags from the boundary ones into a new way. Having learnt from my last foray into running a semi-automated script (http://lists.openstreetmap.org/pipermail/talk-au/2010-August/007037.html), I'll await feedback before rushing into writing one for this purpose. It's not just rivers. For instance when I was adding an island, the feature was already traced out as way http://www.openstreetmap.org/browse/way/32317361 and then to seperate the islet feature from the administrative boundary I added a new way for this http://www.openstreetmap.org/browse/way/78499826. But I don't know what's the best practice here. This is really a general mapping question, not about the use of specific tags so I'm not sure if tagging is the right list to post to, but anyway. _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
