Officially, Trout Unlimited is calling its new TroutBlitz program a "citizen-science initiative" to figure out where healthy native and wild trout populations exist across North America. Personally, I think the folks at TU are trying to find some new fishing spots.
This isn't the first citizen-based mapping effort to be tried by a conservation group. I have no idea how things have gone for the others, but the fact I haven't seen a follow up release is telling.
I'm poking fun at TU, but there is a real value in the idea of using those who love a resource to invest in it by helping create maps to protect those resources.