8 ms·
I know that the Montana topographic quads are based off of surveys done in the 60s and 70s. A lot of them have been updated, but the names don't always get cha
by trafficlight 16y ago
I know that the Montana topographic quads are based off of surveys done in the 60s and 70s. A lot of them have been updated, but the names don't always get changed.