[Historic] Temporal Tagging

[Christian Quest]

2013/1/23 Mikel Maron <mikel_maron at yahoo.com>

> Interesting thought to add time ranges to tags, re "All changes to
> attributes as described above must each have a time associated with them.".
> And I like Christian's suggestion of modifying existing tags, in a similar
> way to name localization. That makes sense in the OSM universe.
> It can also apply to uses of entity, like a building that starts off as a
> historic home, becomes a museum or an office.
>
> And to link an entity that changes geometry over time, well, relations
> could be adapted for this.
> Confidence factor is important to record, and that could sit fine in tags
> as well.
>
> The trick for all this is how does it can translated into schemas for
> rendering, geocoding, etc. What's an efficient way to represent these
> things in postgres, in order for mapnik to make tiles?
>
>
>

I think postgres just needs 2 additional fields: start_date and end_date
that should be extracted from the tag key suffix when importing osm data.
Then, Mapnik stylesheets need to include date range in its query using
these 2 fields.


-- 
Christian Quest - OpenStreetMap France -
http://openstreetmap.fr/u/cquest<http://openstreetmap.fr/u/christian-quest>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/historic/attachments/20130123/c3d1bb57/attachment.html>