Added mapnode to positionAttitudeTransformation (PAT). Map of the mapnode
is added with an imagelayer.
I keep incrementing the position of PAT in y axis by 1.0 which moves imagelayer in y direction.
Here, I would like to know how much the imagelayer moves geographically(degrees), in terms of
longitude. Observed that GeoExtent of the imagelayer is not changed on PAT position change.