Map Maker is an important tool for cartography.
Google Map Maker, a web app-based online map editor lets users to add to and edit Google Maps.
The fact that Google Maps is crowdsourced gives it a upper hand on Apple Maps.
How did the prank images appear on the real Google Maps?
Doesnt Google have some kind of approval system?
It does, but that process depends on trust.
Map Maker edits are done in a sandbox that allows a user to test and save map drafts.
When a new user saves an edit, it is sent into a queue for manual approval.
An edit shows up on the public Google Maps once approved and can be viewed by everyone.
As of May 12, 2015, Google Map Maker is unavailable to all users.
This is one of the occurrences that had led Google to the decision to suspend the service.
As of now, there is no clarity as to when would Google Map Maker would be available again.
source: www.techworm.net