Same framing, different times, how?

[JeanMichel]

Hi,

Following up on the last couples of replies it occurs to me that one could print an image (perhaps in black and white and even manipulated to make outlines more pronounced) on a transparency, sized to the camera's screen. You could even include whatever information you needed on that transparency.

Jean-Michel

[Doug Peterson]

Shoot tethered to Capture One and use it's overlay feature. Slick as can be.

Or buy a leica distometer and measure three points of reference. With time and care you could get within a few mm of each direction.

Doug Peterson (e-mail Me)
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[DaveL]

Interesting topic. Others have done this, creating 4 season photos of a site of interest.

Old surveyor training would have had me suggesting what another has suggested...
* create a bench mark (hang a plumb bob from your camera and mark the point)
* record instrument height
* record focal length (or use a prime)
* take picture

But I did read your comment about it being a heritage site. 

A lot of surveying technique is to ensure that the instrument is in the same spot, same height, and oriented the same way (level). Keeping it simple, I would put a level on the hot shoe of the camera, and make a note of where I was standing/where the camera was when I took the photo with a level camera, and I would want to use a prime lens to keep it simple.

Just my 2 cents worth.