[OSM-talk] proposed key for defining historical changes to locations

[Robert (Jamie) Munro]

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Robin Paulson wrote:
> i've proposed a tag to allow the generation of historical maps, could
> i get some comments please?
> 
> http://wiki.openstreetmap.org/index.php/Proposed_features/key:date
> 
> apologies for the poor explanation, i'm struggling to get it settled
> in my head - anyone who sees what i mean and can help with clearer
> english, your help would be much appreciated

start_date and end_date already exist in Map features and IMHO should be
used for this purpose.

I don't know if the renderers recognise them, but they should either
hide or sort of grey-out things whose end_date has passed, and they
should show things whose start date hasn't been reached yet as "under
construction".

Robert (Jamie) Munro
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