Dave, there's a (non open source) augmented reality application for the iPhone and Android that shows you what peaks you are looking at through your phone camera. <br><a href="http://peakar.salzburgresearch.at/">http://peakar.salzburgresearch.at/</a><br>
<br>They say that all the data they use comes from OpenStreetMap (see the FAQ). <br><br>Not sure if this is solely using the compass or whether it does image recognition also.<br><br><div class="gmail_quote">On Mon, Mar 28, 2011 at 7:57 PM, Dave Patton <span dir="ltr"><<a href="mailto:davep@confluence.org">davep@confluence.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">On 2011/03/28 1:48 PM, Michael P. Gerlek wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Consider the following hypothetical problem:<br>
<br>
Assume we have a good elevation data set for a large region of the earth --<br>
say, an entire mountain range. Now let's say we have a photograph taken<br>
from the ground, the horizon of which shows the profile of a couple of the<br>
mountains in that range. Can you tell me where the photograph was taken<br>
from?<br>
</blockquote>
<br></div>
Something I've been interested in is sort of the<br>
reverse problem - knowing where a photograph was<br>
taken(e.g. you have a GPS waypoint), and maybe<br>
even a bearing (e.g. from a compass), can you<br>
tell me what mountains are in the photograph?<br>
<br>
Because of the potential viewscape, having good<br>
elevation data for "an entire mountain range"<br>
may not be sufficient. For example:<br>
<a href="http://members.shaw.ca/davepatton/photos/boise2.jpg" target="_blank">http://members.shaw.ca/davepatton/photos/boise2.jpg</a><br>
That was taken On the Pinecone Lake Trail, near<br>
Squamish, B.C., Canada. The view looks past Hopefull<br>
Meadows over the Boise Valley, with Mount Baker<br>
(Washington State, USA) in the distance.<br>
<br>
-- <br>
Dave Patton<br>
CIS Canadian Information Systems<br>
Victoria, B.C.<br>
<br>
Degree Confluence Project:<br>
Canadian Coordinator<br>
Technical Coordinator<br>
<a href="http://www.confluence.org/" target="_blank">http://www.confluence.org/</a><br>
<br>
Personal website:<br>
Maps, GPS, etc.<br>
<a href="http://members.shaw.ca/davepatton/" target="_blank">http://members.shaw.ca/davepatton/</a><div><div></div><div class="h5"><br>
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