What is the ISS Taking Pictures Of?
Nathan Bergey is an “open source rocket scientist” who pulled together data from the 1,129,177 photographs taken from the International Space Station since its launch over 12 years ago. He then plotted out a dot on a map for each photograph taken and come up with a set of interesting data. As Bergey puts it, most of the photos are taken of land with coastlines, islands and cities as popular targets. Given that, just plotting out the photographs makes it possible to make out basic continents.
Bergey further breaks down the images on his site based on the mission being conducted at the time. Visit his site for the full set of data and higher resolution images.