I feel like I half-remember something I saw here on HN a couple of years ago, about some mapping related startup going out of business, and open sourcing some interesting tidbits. Do you (or anyone else) happen to remember that, or know what I'm talking about?

Sorry for being so vague, that's just all I remember of the whole deal. I probably bookmarked the link, but I'll probably never find it again now.

Edit: it may have been MapZen that I was thinking about.

https://www.mapzen.com/blog/shutdown/