Hi Brent:
You can go the other way, that's to say if you know the location you can
determine two possible date-time pairs.
http://www.prc68.com/I/Nav.shtml#Bg
Have Fun,
Brooke Clarke
http://www.PRC68.com
Fred Sawyer wrote:
See the Obsession episode from season 2 of NUMB3RS. I consulted with
the producers on that episode to develop a way to use shadows in
photographs to determine the location, given the date and time of the
photo.
Fred Sawyer
On Fri, Jul 8, 2011 at 4:40 PM, Brent <bren...@verizon.net
<mailto:bren...@verizon.net>> wrote:
Hello again;
I was looking at an aerial photograph of a piece of property with
a surveyor.
We started to discuss when the photo was taken.
We could tell by the brown vegetation that it was probably late
summer here in So. California.
I also noticed a shadow cast from a telephone pole.
I think by measuring the height of the pole, the length and angle
of the shadow I might be able to figure out what day of the year
it was taken and the time. I would have to know the latitude and
longitude to do this. I knew the top of the photo was north.
I started to think if I only knew the day and time the photo was
taken I might be able to determine the latitude and longitude.
So I wonder if police ever use shadows in their investigations?
For example, a video of a terrorist holding a hostage. The hostage
holding a newspaper showing the date. They are outside with
visible shadows being cast. Could we figure out where they are
holding the hostage?
How about if the police say I ran a Redlight at 3pm on a certain
date and they have a photograph to prove it.
Maybe if they were wrong, I could prove my innocence by the
shadows cast by my car.
So guess the big question is, does anyone make practical use of
shadows?
thanks again;
brent
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