Lidar ain't much use without an air platform .. and it will basically just give you topography; surface land shape, vegetation density and snowpack (with tweaks), etc.
If you're using an air platform and want to explore for metals .. why not go full EM and magnetic survey while you're there ...
Sure you're not an AI-bot saying silly things?
Defrost, now assuming there did not exist an interpretation that makes that original comment sensible - and really, I can think of one (it is vague and does not matter now) -, now consider the several possible reasons one may say instances of what you call «silly things», starting from a very personal sense of humour to very possible, "very personal other states". Automation being just a very limited sector in the realm of possibilities. Now see the image of somebody calling a "bot" somebody else who may, in an important range of cases, struggling for their own reasons - a few of them also common to all of us, unless for example some Benjamin Button's syndrome had you born fully adult.
I myself had been called "a bot" in this pages for having written very, very valid, I grant you, pieces of data and instances of reasoning that some in the public could not understand and dismissed. Even the style I used for this post I can already tell you will trigger a "must be a bot" in some readers. Very "avoidable" responses.
Take the seconds required to make a list of why people may «say[] silly things», and see why it is not a good idea to call them a bot. If you really cannot figure out some trivial possibilities, I may mention some among us that could create Operating Systems and yet "struggled".
Edit (an addition):
Paradoxically, if you could not understand, in some "Voight-Kampff test" scenario, why it would be offensive to call a bot e.g. some "Nietzsche" behind the curtains, guess who the Bayesian needle would incline to suspect as a bot.