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If you search for images on Google, you’ll often see numerous results which have been stamped with watermarks for stock photo companies. These watermarks protect photographers and other copyright holders from having their work taken and used freely without licensing.
I remember back when Google Earth first launched. I thought it would be cool to see the planet right from my desktop and immediately went to find my house. The area where I live was so blocky and cut together from so many individual photos that it was impossible to make out any detail.