This repository hosts the source code for the http://mapofcpan.org/ web site. You can check it out and run it locally. It will eventually be packaged as a CPAN distribution to make installing the dependencies easier - they're currently listed in dist.ini.
The web site itself is a client-side Javascript app that talks to the https://api.metacpan.org/ site. The Javascript code loads some images and other data which are generated periodically as static files by the supplied Perl scripts.