Joker was here!

[Batman]

Does anyone know if the beautiful painting of railway tracks the Joker puts a signature on is a pre-existing painting or if it was created specifically for the movie? If it's a pre-existing painting, any information on what it's called and who created it?

It's such a cool painting, fits right in the movie. Stylistically it also reminds me of the art deco railway system/ public transportation system from Batman: The Animated Series.

I would like to have it hanging in my apartment, with or without the Joker's signature.