Once the photo spheres are connected and published, people can navigate between them on Google Maps, just like they can in Street View.
This crowdsourcing of Street View data offers a solution to a huge problem for Google: keeping 5 million unique miles (8 million km) of Street View fresh and accurate.
As we pointed out in March 2013 in a detailed article (read here), there is a sizeable part of the Street View coverage that has not been refreshed since 2008-2009.
As a consequence there is a strong need for Google to come up with a crowdsourced way to update Street View. Yesterday’s announcement is the beginning of that.