...Have you actually used the item scanner?
...You need to be within a certain range of whatever it picks up.
..Or have you not used the item scanner before?
And I am not talking about the ping for that very reason.
If you're exploring to actively find a certain item, the item scanner will let you take a more progressive approach to it instead of blindly wandering around hoping by sheer chance that you bump into whatever you need.
Secondly, in about top of the middle of the map, west of the 3rd spawn area is "all the ore types having nodes in a nice tight ring around the spawn point"... Don't need to ask for whats already there.