I would go a different route and allow the SRV & Ship scanner to do that. The ship in a similar way to that of how it would find POIs and the SRV scanner have a new scanner sound / visual indicator. These wouldn't be precise but give you something to make traversing areas where the samples may be (literally) thin on the ground easier to spot, especially on celestial bodies that don't get anything more than twilight or less. The handheld scanner could then be used to zero in on a sample once an area of interest has been discovered as it currently does.
Not averse to that, maybe as an additional thing (but probably should have to be done initially from on foot), it could be that right click handheld ping will populate the in ship/srv radar too, i.e. you find one plant and scan it on foot, then right click for the ping, which populates all your huds, foot, srv and helmet for the nearest next entries (assuming any are within range at all). That audio ping thing could actually be quite engaging (more than the scanning lol!), i.e. you ping one direction hear a faint return ping, turn and scan another direction and hear perhaps multiple closer pings but harder terrain. Decisions decisions.
Similarly the ship and srv huds that allow selecting and showing what a thing is on the ground should obviously also be able to be done on foot. It's bonkers that you can 'select/target' a thing in your srv, like a fumerole material, shoot it off and see what the material is, or select a cargo canister and see what it is, but you cannot do that on foot.
Just illogical UI disconnects between one thing and another, after almost a year. It is exasperating.
