text: No, it's not "subjective interpretation," it is me establishing nexus to declare "this is a park," as I, myself, just treated it like one.
  
  It is an open space.  USLegal (.com, go find your own that agrees with your confused understanding) "Open space generally refers to undeveloped land...".  Nobody "gets the cops called on them" for being on open space, unless that open space is specifically closed to public access (some are).
  
  Santa Cruz (city of) owns two HUGE open spaces:  one near Loch Lomond (some old railway ROW), relation/7101595, another, also closed to the public:  relation/7101798 next to Bonny Doon Ecological Reserve (California Department of Fish and Game, which contains closed and open areas).  These are not tagged parks, correctly I believe all agree.  However, they are not managed by the Parks & Recreation Department one is an important watershed area near Loch Lomond, the city's primary drinking water reservoir.  Yet, I recently much better tagged the leisure=park at Loch Lomond (with the boat dock...) relation/9477845, and "the watershed," relation/7101509 because even they both have the same name and are administered by the same agency for largely similar purposes (and both are open to recreation), they are slightly different areas and so deserve slightly different tagging (one park, one not).  This is evidence of my careful tagging of parks and park-like-but-not-quite-parks around here.
  
  You are mistaken about me never having been here.  It's just a few blocks from a friend of mine for over forty years.  You assume far too much.