I subscribed today to this list after seing some mention of Historical OSM in one of Jeff message on another OSM list.
I'm also interested in that area, keeping track of data from the past if possible directly in OSM. Who am I ? My french accent is hidden by the internet (so far) but, yes, I'm from Paris area (this will help understand my strange english sometime). I've been mapping my home town extensively over the past years after discovering OSM because of genealogy (looking for place names, and people names in toponyms*). I'm involved in OpenStreetMap France board (secretary of our non profit association). On the french OSM forum, we had a recent talk about historical details in OSM. I started drafting some tagging scheme that would not collide with present tags. I've only tried to deal with tags, the semantic part of OSM, not the geometry part that may also depend on the time. The idea is to add a time range to a tag, example: The current name is "Place Charles de Gaulle", but until 1970 it was "Place de l'Etoile" (located on the upper end of Champ Elysée in Paris). name[:1970]=Place de l'Etoile name=Place Charles de Gaulle A building was a court house until 1927 and is not a shoe shop (at my street corner): building=yes shop=shoes amenity[1905:1927]=court_house Dates can be formatted to deal with different calendars, BC dates, fuzzy dates. Data users that do not want to keep these details from the past can simply trash any tag containing brackets. If you want to deal with these details, extraction of the date range can then be stored in additional "start/end" fields the database schema you're using. Well, this is more a brainstorming that actually a draft of some proposal. * about toponyms, I've recently added a proposal for wikipedia:name tags to link a name to a wikipedia article... but this is another topic. -- Christian Quest - OpenStreetMap France - http://openstreetmap.fr/u/cquest _______________________________________________ Historic mailing list [email protected] http://lists.openstreetmap.org/listinfo/historic
