Public land in the West isn't well-marked, and the difference in usage rights between private, state, and federals lands is not well understood by the general public, and sometimes not possible to know without recent data from the managing organizations regarding current permits and claims on various parcels. I've been thinking for years that I should write an app that reads your location, looks up related data, and tells you exactly what land you are on and what the allowed uses are. Especially out in the Western wilderness areas when you may be crossing into different parcels and walking in and out of various mining and mineral claims without even realizing it.