As the concept of "disused" could apply to millions of different things,
I would prefer to see a more generic system which could be applied
uniformly. I would like to see the "life_cycle" tag resurrected
(proposed in 2008) something like this:
life_cycle=planned (only exists on paper)
life_cycle=construction (under construction)
life_cycle=open (default, open for business)
life_cycle=disused (but could easily be re-opened)
life_cycle=abandoned (could not easily be re-opened)
life_cycle=temp_closed (e.g. during road works)
life_cycle=temporary (only in existance for a short time, e.g.
during road works)
A generic method of tagging a generic concept feels much better than the
variety of ways described in
http://wiki.openstreetmap.org/wiki/Comparison_of_life_cycle_concepts .
This was proposed in 2008 (see
http://wiki.openstreetmap.org/wiki/Proposed_Features/Status) but was
rejected after a tied vote 15-15. Most of the objections centred around
backward compatibility problems. If it's the right thing to do, sure
it's going to cause a little pain in the short term, but the problems
will only get bigger if the nettle is not grasped.
Colin
On 21/12/2010 00:15, Craig Wallace wrote:
On 20/12/2010 22:23, [email protected] wrote:
I came across
http://wiki.openstreetmap.org/wiki/Proposed_features/Disused_road
today. I applied the proposal page template, indicating that the
proposal had been obsoleted, as noted in the commentary on the page.
Looking at the tag info for highway
(http://taginfo.openstreetmap.de/keys/highway), I see that there are
presently 88 instances of highway=disused.
Would you support addition of highway=discussed to
http://wiki.openstreetmap.org/wiki/Deprecated_features as:
* Date: (date of agreement here)
* Old Key/Value: highway=disused
* Suggested Replacement: highway=*& disused=yes& access=yes (no
implied)
* Reason: creation of general disused key
The main problem I see with this proposal is the indication at
key:disused that the use of the key implies access=no, which is not
necessarily true in the case of a highway which is disused. Could
this be circumvented by the inclusion of the 'access=yes'
recommendation in the suggested replacement?
Thanks for considering this. --ceyockey
(http://wiki.openstreetmap.org/wiki/User:Ceyockey)
I think using disused=yes is a very bad idea.
It will break all of the existing renderers/applications that don't
know about that key, as they will show disused roads as normal roads,
or use them for routing etc.
It means any routing application has to check for two different tags
(or even more if you get things like abandoned=yes, construction=yes
etc), before knowing whether the road is usable or not.
So I think disused=yes should be deprecated.
I think a better option would be a kind of namespace thing. eg
something like highway:disused=primary etc.
Then that will be safely ignored by any applications that don't
know/care about these roads.
There's a useful page here which summarizes some of this, and the
pros/cons of different options:
http://wiki.openstreetmap.org/wiki/Comparison_of_life_cycle_concepts
Craig
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