© 2010 Willy Kaemena, All Rights Reserved.
PTGui, Photoshop, Photomatix4, CubicConverter
See a photo of the building here where you can see that glass wall on the roof.
I used two coupled monopods in order to get the camera slightly over the edge of that wall. A total of about 20 photos were taken, while walking along the roof wall. Stitching and post processing were a challenge as huge parallax errors were produced by taking the pictures on this large rectangle roof.