[OSGeo-Discuss] Finding position based on horizon profile?

[Mr. Puneet Kishor]

On Mar 29, 2011, at 9:23 AM, Ian Turton wrote:

> On 28 March 2011 16:48, Michael P. Gerlek <mpg at flaxen.com> wrote:
>> Consider the following hypothetical problem:
>> 
>> Assume we have a good elevation data set for a large region of the earth --
>> say, an entire mountain range.  Now let's say we have a photograph taken
>> from the ground, the horizon of which shows the profile of a couple of the
>> mountains in that range.  Can you tell me where the photograph was taken
>> from?
>> 
>> Any pointers to research in this area would be appreciated.
> 
> I think that http://www.heywhatsthat.com/ does some of  what you want.
> I'm on a very slow hotel internet connection so I can't actually get
> it to load just now. But my Delicious tags seem to indicate it's an
> answer.
> 

Yes, that is the one I have been thinking of since the start of this thread. Thanks Ian, for suggesting heywhatsthat.com. It was pointed out either on this list or on geowanking a long time ago, and I just couldn't remember it. It is pretty cool.

Puneet.