2017-09-14 13:10 GMT+02:00 Nicolas VIGNERON <vigneron.nicolas@gmail.com>: 
The retrieve is done with a Wikidata query, probably something along « all the items on Wikidata with the P1435 property » (https://www.wikidata.org/wiki/Property:P1435 , with maybe some refinements, Paweł correct me if I'm wrong).

The query is really simple, it shows items from Wikidata with coordinates and with any value P1435 (heritage designation) or P2186 (WLM ID).

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Paweł Marynowski

Stowarzyszenie Wikimedia Polska

http://pl.wikimedia.org/