Rephotography's the act of repeat photography of the same site, with a time lag between the two images; a "then and now" view of a particular area. Some are casual, usually taken from the same view point but without regard to season, lens coverage or framing. Some are very precise and involve a careful study of the original image. The founding work in this style was the Rephotographic Survey project, conceived in 1977 by the project's chief photographer, Mark Klett. This project engaged 120 sit… (More on Rephotography)