Over the last 10 years, businesses, scientists and hobbyists from all over the world have been using Google Earth Pro for everything from planning hikes to placing solar panels on rooftops. Google Earth Pro has all the easy-to-use features and detailed imagery of Google Earth, along with advanced tools that help you measure 3D buildings, print high-resolution images for presentations or reports, and record HD movies of your virtual flights around the world.Starting today, even more people will be able to access Google Earth Pro: we're making it available for free.
http://google-latlong.blogspot.ca/2015/01/google-earth-pro-is-now-free.html