Hello,

I reviewed your latest edits.
I am afraid to inform you that we have a real problem with this MapRoulette task.  We already informed the author of this task that it triggers a very large number of false-positives.

I also inform you that in the city of Brussels, Belgium, we have a full inventory of all building outlines.  With other local mappers we have put a lot of care in drawing building shapes correctly, by combining government data and our own surveys.  Yes, some buildings do have spikes.  Yes, it is normal.  And sadly, MapRoulette users are not fixing anything.  On the contrary, they are destroying years of patient work we put here.  This is also why we do not use aerial imagery to map buildings, and definitely not in the iD editor.

I appreciate the intentions you have to fix the map.  Maybe there are other places in the world where mappers’ time is wanted, but please consider pausing your edits in our city because of this problem.  I’ll care to revert the faulty edits.

Have a nice day.