ij_ (2015-04-27 12:40:05+00:00): So, was it "mistake or redundant information", I don't believe you can say honestly you thought it would be either? That it only appears once doesn't mean it's a "mistake" and certainly you cannot decide if it's redundant information either as you don't even know what it means. Locals certainly might know what it is (I do and many mappers interested in city planning aspects likely do also) and even Google was clever enough when I pushed it slightly (it's not easy though if you don't have any clue what to look for). I suspect the other spots with "välkky" have used other tag or haven't just been tagged so far. ...So, what I said earlier still applies: find a better tag for it, or revert and let locals change it to a better tag at a later time (if there's some available, I don't know immediately nor have time to browse wiki to see if there would be some relevant tag).

See now, we end up spending again extra time on this pointless arguing. Your change was simply not good, I hope you could just accept it. In addition you probably have to accept that you might need too much local context to really fix these the way you're currently working (and perhaps some similar cases in the future you're likely to encounter if you keep doing these cleanups). I know there's lots of useful edits from this cleanup process you're participating in,  also from you (I found at least one while checking your track record in Finland :-)). However, it would make it much less painful for all if you could please avoid touching keys which make absolutely no sense to you and seem like no obvious typos or such. And when you still end up occassionally making mistakes (who wouldn't), you would simply accept that a revert is the easiest way forward (less time wasted and more productive work done). No need to explain like you did as the local likely knows already enough as he/she gave you feedback which you hopefully value (if this kind of error repeats itself, I simply recommend that you say to the next mapper giving feedback that you'll leave it to the locals to fix when they come across it, they also care for the data like you do)!

And btw, I'm quite sure that alv still remembers and would have told you if you would have asked! And even better, we'd have avoided this whole episode if you would have asked _first_ and acted only after that when you know what it means :-).

I wrote to some previous guy who just removed stuff something along these line: Because of these random removals, those people doing the hard work of surveying need nowadays fear for their tags (especially if there are not yet that many of the particular tag). I hope you understand this mapper/surveyer perspective also when removing anything :-) (which is much more than what I could achieved by simply telling you what "välkky" is). Thanks.

Spoiler: "välkky" is a device that blinks or otherwise highlights the crossing traffic sign poles when it detects nearby pedestrians (or bicycles). Usually installed close to schools or some such "sensitive" places. There are at least dozens of them installed in Helsinki region alone.

And my apologies for writing so long reply, I just cannot keep replies neat and short like some other people.