Is there any kind of functioning graphical device to create nagios customer - provided map works with to hosts?
I recognize it is not specifically what you request for yet with NagVis you can easy create PowerPoint like network maps.
An additional means would certainly be to set the moms and dad of each host appropriately. After that the automated standing map need to be alright.
If you make use of Linux you can attempt Nagios 2D Status Map Editor also.