Updating google earth maps
It is possible to request updates on the Google Maps home page; notifications are sent to the requester when the change is made, even if it takes years.
It is also possible to track changes to Google Earth through the "Google Earth Imagery Updates" button on the Google Earth home page.
Google has updated its mapping applications with new, higher-resolution imagery from NASA's Landsat 8 satellite, the company announced today.
That means Google Maps and Google Earth now contain far sharper and more detailed photographs, which Google used to update its cloud-free mosaic of the planet.
With Google's Follow Your World tool, you can also sign up for email notifications when specific location images change.
Below, you can see the how Landsat 8's imagery of New York City is vast improvement over what Google was using before: Google says its new mosaic was crafted from nearly a petabyte of data containing more than 700 trillion pixels.According to the Google Earth Blog, data updates usually happen about once a month, but they may not show real-time images.Google Earth gathers data from various satellite and aerial photography sources, and it can take months to process, compare and set up the data before it appears on a map.There are times when Google Maps updates in real-time to mark major events and to give assistance in emergency situations.For example, it updated imagery for the 2012 London Olympic Games just before the Opening Ceremony, and it provided updated satellite crisis maps to help aid teams assess damage and target locations in need of help shortly after the Nepal earthquake in April 2015.
You can't find out when a map was last updated on Google Maps.