What can I do with weed mapping?

So I’ve been spraying a lot lately, and it struck me that I’m spraying lots of ground that just doesn’t need it so I was thinking of mapping.
i realise that we are about to have a new agricultural revolution and teenagers running crowd funded business which don’t come up with much are going to save the world but in reality what can I do right now?

i am/ was keen on the idea of skippy scout however a bit of a go with it shows that scanning a whole field at a resolution able to identify weeds...

What can I do with weed mapping?