Google has rolled out an update on their Map Maker platform. This update is designed to enable collaboration between friends to work on local maps.
They can now use Google Plus to ask for information and peer reviews. Google said:
Anything you share from Map Maker will appear on your Google+ profile to the circles and individuals with whom you’ve shared the post. People in your circles can comment on your post, and from there you can continue on your way to creating comprehensive maps of the places you care about most!