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How precise is a sundial? How high is the resolution of the camera? I'd imagine that on a bright sunny day with a high resolution camera showing clean sharp sha
by w_t_payne 6y ago
How precise is a sundial? How high is the resolution of the camera? I'd imagine that on a bright sunny day with a high resolution camera showing clean sharp shadows, it'd be possible to get a precision much better than +/-1h.
- enriquto 6y agoSure, I was thinking about a photo of human subjects in the foreground, with some distant buildings in the background. But if you photograph the shadow of the Eiffel tower on a clear sunny day you may be down to the precision of a couple of minutes.
- Ntrails 6y agoBut that's only if you can resolve the "which day" issue?
- enriquto 6y agoOh, yes, that seems a hard problem. But with sufficient effort (cloud patterns, parked cars, other people in the image) there is still a lot of information to extract. Especially if other people were taking exim-tagged photos in the same time and place and putting them on instagram.
- deleted 6y ago[deleted]