On Wed, Jun 12, 2013 at 12:38 AM, Zecke <span dir="ltr"><<a href="mailto:zeck@saeuferleber.de" target="_blank">zeck@saeuferleber.de</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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image:ancient=<url> ancient image of the object<br>
image:<date>=<url> dated image, where date
format undergoes the rules described e.g. here:
<a href="http://wiki.openstreetmap.org/wiki/Key:start_date" target="_blank">http://wiki.openstreetmap.org/</a></div></blockquote><div><br></div><div>While there is considerable interest in historical data attached to OSM objects, the image tag is not the place to innovate.</div>
<div>The same desires exist for building outlines, roads, etc.</div><div><br></div><div>See:</div><div><a href="http://wiki.openstreetmap.org/wiki/Comparison_of_life_cycle_concepts">http://wiki.openstreetmap.org/wiki/Comparison_of_life_cycle_concepts</a></div>
<div><a href="http://wiki.openstreetmap.org/wiki/Open_Historical_Map">http://wiki.openstreetmap.org/wiki/Open_Historical_Map</a></div><div><a href="http://openhistorymap.net/">http://openhistorymap.net/</a></div><div><a href="http://www.slideshare.net/frankieroberto/mapp-history-on-open-street-map">http://www.slideshare.net/frankieroberto/mapp-history-on-open-street-map</a></div>
<div><br></div><div>OSM's core purpose is for things that are observable now. Things one can't observe are problematic in OSM. </div><div><br></div><div>Abandoned objects however are fine:</div><div><a href="http://wiki.openstreetmap.org/wiki/Key:abandoned">http://wiki.openstreetmap.org/wiki/Key:abandoned</a></div>
<div>They should be mapped as they are now, and can leave some traces as to what they were.</div></div>