Raiatea (Tupaia’s homeland) s the second largest island in the Society Island group.
Confusingly Tahiti is the name of the largest island in the Society group, but sometimes refesr to all of French Polynesia, which includes the Marquesas, the Gambier, the Austral, and the Tuamotu islands and atolls.
This website expands on Tupaia’s background and his relationship with Captain Cook. It includes information about navigation, as well as the differences between Oceanic and European perceptions of nautical navigation. Tupaia’s map covered over 2500 nautical miles.
Useful Google map of French Polynesia
also shows surrounding chains such as the Southern and Northern Cook Islands. The map below shows the actual location of named islands on Tupaia’s map.
View Tahiti Drawn for Captain Cook in a larger map