[OSM-talk] New Proposed Feature: Tagging the age and duration of existence of features

[Paul Johnson]

Lester Caine wrote:
> OJ W wrote:
>> start_date=, end_date=
>>
>> http://wiki.openstreetmap.org/wiki/Map_Features#Properties
>>
>> http://osmdoc.com/en/tag/start_date/
>>
>> http://osmdoc.com/en/tag/end_date/
>>
>> maybe someone could create the tag pages for those on wiki?
>>
>> 2009/5/22 Peter Dörrie <peter.doerrie at googlemail.com>:
>>> Hi everybody,
>>>
>>> I made a proposal for tagging "the 4th dimension". Hope you like it ;)
>>>
>>> http://wiki.openstreetmap.org/wiki/Proposed_features/4th_Dimension
> 
> There are a couple of things here that need discussing, but hopefully 
> that can be a quick discussion. MANY of the features on the map can be 
> identified with a 'start_date' and it would be nice to have that 
> information. Lots of new roads are being built, and many historic 
> locations have a construction date.
> 
> The problem comes with 'end_date', and since in some areas roads ARE 
> being destroyed, are they removed from the map or CAN they be left with 
> an end_date and features which have an end_date earlier than the current 
> date are ignored? ( I'm thinking of the 2012 Olympic site which has 
> re-routed many roads? )

I can also see this functionality quite useful in the US, where at least
in Oregon, DOT has had lots of funding made available to rebuild
freeways and continue building the state cycleway system (which has
largely been neglected since the 1970s).  I imagine it would allow a way
to be marked as closed for construction during the time it's scheduled
to go on, then automatically revert back to being a finished way later.
 Not to mention save me a lot of checking and rechecking.

> ( start_date and end_date were I think added for things like festivals 
> and other transitory map information, so it may be appropriate to 
> redefine them as constructed_date and demolished_date to distinguish 
> historic data from transitory data ? )

That could be useful as well, since RCN-40 is so congested as to be
impassable whenever the Rose Festival is going on in Portland, Oregon or
Luis Palau brings his complete failure in crowd control to Waterfront
Park and fails to keep the cycleway clear for through traffic (part of
the condition of renting the park).  As well as for the myriad of
parades that makes Portland traffic and transit impossible for much of
the Rose Festival season.


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