Map's description says: A map of torii gates located outside of Japan created by Kaitlyn Ugoretz (UC Santa Barbara/Nanzan University).
Bingo! I will probably die before I could map all the torii in Japan (where I live). But everyone expects torii in Japan. Torii found elsewhere are fascinating to me. ^_^
I'm not sure what would happen if you tried to add every single torii at Fushimi Inari to google maps.