I submitted a map correction to Google maps a few years back. They had our satellite office listed a quarter mile from where it actually was. I gave them the correct place with screenshots, verification I worked for the company, and arrows pointing to the exact location along with their own street view of the actual building. It took well over a month for them to respond and they still got it wrong. Now it shows us at the building two doors down from us, but at least that's better than a quarter mile.