Google Maps uses the same satellite data as Google Earth andupdated together usually once or twice a month. To better understand the degree in which Google Earth is updated, it is important to understand the two dynamics that make Google Earth function properly. To begin with, Google Earth uses satellites to take images of the entire country.
Several years ago, Google engineers figured out a way to stitch together satellite imagery to remove clouds, giving Google Earth and Google Maps users a better and more comprehensive view of the ground below. Today, the company has repeated the process, but this time with newer, crisper imagery from NASA and the U.S. Evolution ekeys 37 driver. Geological Survey’s (USGS) Landsat 8 satellite.
When Google first unveiled its techniques for eliminating from Google Earth images striped artifacts, clouds and other atmospheric effects, it was using imagery from Landsat 7.
![]() New Updated Google Map
However, the images Landsat 7 captured after 2003 were affected by a hardware failure that resulted in diagonal gaps of missing data. This was still the best imagery available at the time, though, which forced Google to come up with a means of removing those gaps from Google Earth. It did so by analyzing a large number of images, similar to how it produced this global time-lapse image of the earth.
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Now Google has updated Google Earth with the imagery from Landsat 8, launched in 2013. The new satellite is able to capture images with “greater detail, truer colors, and at an unprecedented frequency — capturing twice as many images as Landsat 7 does every day,” Google announced on its Google Maps blog this afternoon.
As before, the new Google Earth imagery is also cloud-free, thanks to mining nearly a petabyte of data. That’s more than 700 trillion pixels, the company notes, or 7,000 times more pixels than the number of estimated stars in the Milky Way, it adds, having fun with the numbers.
The result is sharper and more current images on Google Earth than before. Where things were blurry, they’re now crisp — for example, when you look down on New York City, you can now see details like skyscrapers, building shadows and baseball fields in Central Park, thanks to Landsat 8. Landsat, which has been in operation since 1972 to track changes to the earth over time, makes its data open and accessible, which is how Google is able to update its maps products as new imagery becomes available.
Most Updated Google Maps
The updated maps are live now in both Google Earth and when viewing the satellite layer in Google Maps.
We are often asked how often Google updates the imagery in Google Earth. The answer depends on where you live and can be anywhere from once a week to never. For much of the world, there are certain hotspots that get fairly regular updates and other places that have no high resolution imagery whatsoever. To get an idea of where the hotspots are, see our posts on historical imagery density.
The continental US is a special case as it has complete coverage with aerial imagery that is updated over time in large patches that are not concentrated around particular points of interest. The US government has had various aerial imagery gathering programs in the past whose imagery Google has since acquired and put into Google Earth. These appear to have often been done state by state, or at least the imagery Google acquired often follows state boundaries. More recently, however, Google has had its own imagery collection program. So, we decided to see whether or not they are managing to cover the whole of the US and just how long that takes. We used the Google Earth API to map out imagery of the continental US for the last 20 years.
![]() How Regularly Is Google Maps Updated Images Free
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And if you wish to see the data in Google Earth, download this KML file.
Keep in mind that the areas shown are slightly larger than the actual imagery.
How Often Does Google Maps Update Street Images
We believe Google started gathering imagery around 2012 and the change in patterns is noticeable in the above animation. Instead of following state boundaries, Google appears to gather imagery in what appears to be a random pattern. Analysing the data from 2012 onwards, we believe Google is covering the whole country roughly every three years. There is just one little area in Nevada that seems to have been missed.
We must keep in mind that if you are using Google Maps when there is 3D imagery available, that is what is shown, and that is not included in our analysis here, as the dates and extents of 3D imagery is not available via the Google Earth API.
About Timothy Whitehead
Timothy has been using Google Earth since 2004 when it was still called Keyhole before it was renamed Google Earth in 2005 and has been a huge fan ever since. He is a programmer working for Red Wing Aerobatx and lives in Cape Town, South Africa.
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