I live in Leiden, volunteer for Wikipedia since 2002, data analyst at Wikimedia Foundation since 2008 (retired 2019). I’ve added hundreds of amenity=drinking_water in Netherlands.and nearly all trees in former cemetery, now park, De Groenesteeg in Leiden. With those tree nodes (via Overpass), media files from Commons, texts from Wikipedia and javascript I built an enhanced tree map of the park. http://infodisiac.com/bomen/groenesteeg.html