"Gary Drescher" wrote in message
news:3CB5d.162328$3l3.128083@attbi_s03...
If you have a camera with you (in your cell phone, for example), you can
take a picture from which the plane's altitude might be derived.

Might, but probably not. Most of the time, if the airplane is close enough
to provide a good distance reference based on apparent size, the photo won't
be able to include any ground reference with which to correlate and
determine an angle.

Pete