How to Use Tracking Dogs in Rural Environments

I'm just like trying to understand why that more precision style of tracking doesn't work when you are in a more rural environment. Is it just because it's exhausting for the dog to try to keep that up for longer as a time? Or I understand you don't have the scent ID. There's kind of almost two tasks there that's finding the scent to begin with and then there is the actual following the scent. So I think those different dogs can be combined in a very clever way. For example, if you have a position of the person where the person has been lost seen, there is a shortcut for that one.