Brooklyn Fourth Avenue visioning study mapping tool
Christopher calls our attention to a map-based tool employed in the Fourth Avenue visioning study being conducted in Brooklyn by the NYC Dept. of Transportation. People can zoom the view at a particular location on the street in the study area and add a "post-it note" like comment.
It's pretty cool. I like it because it's focused. One of the problems I have with crowdsourcing is that there can be a lot of spurious suggestions.