How to cut an A0 poster into 16 A4?

[lokami]

The title says it all
I have an A0 poster in PDF that I want to cut up into 16 A4s. How can I do that? I have looked at many scripts/websites/man pages, to no avail.
Thanks for the help

[snibgo]

The "-crop 4x4@" option will do the job.

See Cropping into roughly Equally Sized Divisions
http://www.imagemagick.org/Usage/crop/#crop_equal

[lokami]

Thanks!
By the way, if someone else is looking for this, there is also the PosteRazor application that will do this, but it requires an image as input and returns a PDF
http://posterazor.sourceforge.net/