That's orthogonal to the issue. GNSS gives you a fix anywhere; wireless triangulation gives you a guess in some populated areas (note all the three qualifiers).

That's orthogonal to the issue. GNSS gives you a fix anywhere; wireless triangulation gives you a guess in some populated areas (note all the three qualifiers). Moreover, GNSS gives you a 4D fix: [X,Y,Z,t]; triangulation gives you 2D at best: [~X, ~Y]. Worse, easy contribution to a database is still way off from ease-of-use: now the database needs to get to the end devices, which brings in a whole tangled ball of dependencies. Also, last I checked, OSM doesn't deal in wireless maps.