Excuse me, bro, you were basically asking for a free meal. You basically want someone to spend money on promotion to get adoption rate high enough so that most places have reviews, and all those server cost to serve you hi-res pictures of those places. Oh, and why not throw in some street view cars?

Just wanted you to know that open source is not the same with free service. I, of course, don't have anything useful to you to contribute, because I don't have a million dollar to host a Google Map open source, no tracking alternative. I'm here to comment because your post, in principle, does not belong in this community.