On Tue, Feb 19, 2019 at 4:28 AM Richard <ricoz....@gmail.com> wrote: > It would also be interesting to be able to tag the start of construction - >> often construction starts many years before the building is finshed: >> Airport BER in Berlin, Germany or La Sagrada Familia in Barcelona, Spain >> are famous examples. How to tag this? Maybe: construction:start_date? >> >> Any thoughts on this? >> > > you could map what was there at any particular time but I think it is > better to provide the link to Wikipedia. Ordinary users will ever look at > OSM data close enough to find out this details. >
+1 (but link to Wikidata instead of [or in addition to] Wikipedia) Most OSM data users only care about what is located where. Very few OSM data users would be interested in historical information such as when a building, a basilica, or an airport began and finished its construction. The actual people who would be interested in such information would look elsewhere instead of OSM and I think Wikidata is an excellent place to document such rich types of information. For example, see the Wikidata item for the Sagrada Família: https://www.wikidata.org/wiki/Q48435
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