rephotography
(also repeat photography), n.
A technique of making a photograph that has an image that is, except for the date of exposure, as nearly identical as possible to the image of an earlier photograph.
Notes
Comparing the original and contemporary photographs makes it possible to see changes over time. Minimally, rephotography places a camera at the same location of the original to recreate the original vantage point. Rephotography may also consider the time of day and time of year to ensure that natural light conditions are the same.