Can AVR mark locations of mining or herb nodes?
If the locations for those are available then yes. They are not available normally but there are addons that keep track of their locations. Such addons could use AVR to mark them. However, remember that elevation of items (the Z-coordinate) isn’t available for anything at all. So if for example you were flying looking for things to mine, markers for known vein locations would be in the air directly above the veins at the same altitude as yourself.