I sometimes work for a hospital system in San Diego, and Google maps had the street address/location for the main hospital (where the E.R. room is) off by about 9 blocks.

We noticed it and reported the problem. Another department in the hospital contacted Google via whatever process they had to and six weeks later the address was still incorrect.

We ended up sending an email to about 5,000 employees asking them to report the problem using their home computers.

It took another 3 weeks for Google to update the location.

And at least Google, Bing, Apple, and Yahoo all have reporting mechanisms. If the address is incorrect on a car GPS that uses a DVD people may never get updates.

If you need life saving help , CALL 911. (No agenda with any map here, this is good medical advice.)