It would be great to be able to set the color (gradient) of the element on the Zabbix maps depending on the host item value.
For example - the color gradient of the link with a load on the channel from 0% to 100% is set from green to red. So the map will clearly indicate the load of devices and network. Something like traffic jams on Google maps.
Similarly, can be used items like CPU load, memory, disk subsystem, temperature etc.

Using triggers for that is not very good becouse triggers are generating problems for host. Problems are writing to database and shown on dashboard.
Using text like {Router:load.[4].last(0)} on map in link descritpion - is also not so good when there is a lot of links on the map.