[Tagging] linear vs area roundabout

[Mikel Maron]

Hi


Fwd'd message below ... makes sense to me that roundabout is always linear, but documentation is ambiguous....

Any ideas about this issue?

Thanks
Mikel



----- Forwarded Message ----
From: Thomas  <XX>

 
Mikel,
 
Thanks for the opportunity to ask you some (more general) questions
directly. I’ll promise to keep them short and focused on getting a
general understanding of OSM and some of its inherent functionality. The
technical questions will go to the dev list.
 
In looking at some features I am a little puzzled as to when
a way is an “area” and when it is not and how to resolved the “conflict”.
For example “junction=roundabout”
(http://wiki.openstreetmap.org/wiki/Tag:junction%3Droundabout)
seems to a linear feature even though the way is “closed” –
loops back on itself.  The previous link lists the feature as linear vs.
the table at http://wiki.openstreetmap.org/wiki/Map_Features#Highway indicating that the feature can be both linear and polygonal.
A similar situation arises from “highway=platform”
which could be all three type (according to the table at http://wiki.openstreetmap.org/wiki/Map_Features#Highway)
 
Could you clarify this situation for me?
 
Thanks,
-          Thomas
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