[Tagging] Interpreting "One feature, one OSM-object"

[Pierre-Alain Dorange]

Andrew Harvey <andrew.harvey4 at gmail.com>
wrote:

> 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.

With JOSM you can achieve that by drawing a way by clicking on the node
one by one. It will draw a new way using the same nodes.

There are several "school" for such situation (ie. boundary+river) :
* some tell to redraw completly all things (node + ways) so that it can
be later into several layers (if OSM handle layer someday).
* some split boundary and add tags (reuse nodes and ways)
* some redraw way using the same nodes

All have advantage and disadvantage : numbers of nodes, creating dupe
nodes (QA warnings), maintenance difficulty...

-- 
Pierre-Alain Dorange
OSM experiences : <http://www.leretourdelautruche.com/map/>