From Hungarian photographer, Adam Magyar's website:
The squares you see are non-existent. Each square is assembled from dozens of photos I took of people from a height of 3 to 4 meters. The distance, or rather, closeness allows me to create extremely high-resolution images, thus allowing the viewer to survey each person close-up. Yet, observing the image at close range makes it impossible for us to see it as a whole, while looking at it from a distance results in losing all the details.
Source: The Black Snapper