London skyline, building hieghts

[Gander0]

Anyone have any ideas where I can get a elevational drawing showing major building hieghts in london. I've seen this sort of image a number of times though have no idea where to look.

 

I think it takes the form of a single colored spline.

 

Any help appreciated

 

Thanks!

[Gander0]

For anyone thats interested heres an excellent site from the Museum of Modern Art on the subject of tall buildings:

 

http://moma.org/exhibitions/2004/tallbuildings/index_f.html

[IC]

Thanks-interesting link.