Most of the images are of the same type as shown in the sample and as described. Yes, they are aerial photos of real-world terrain, but at such an altitude and angle as to be limited in usability. They would, however, make a good background for paper mini trays.
The grassland tiles of one type could be more easily utilized, but some of the pages are of multiple images of differing resolutions.
All in all, even for free, most of these pages are within a very narrow scope of usability.