Island
An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island in a river or a lake island may be called an eyot or ait, and a small island off the coast may be called a holm. A grouping of geographically or geologically related islands is called an archipelago, such as the Philippines.
Earthsea
The world of Earthsea is one of sea and islands: a vast archipelago of hundreds of islands surrounded by mostly uncharted ocean. Earthsea contains no large continents, with the archipelago resembling Indonesia or the Philippines. The largest island, Havnor, at approximately 380 miles across, is about the size of Great Britain. The cultures of Earthsea are not direct analogues of those of our world, but are literate non-industrial civilizations. Technologically, Earthsea is an early Iron Age society, with bronze used in places where iron is scarce. Weapons also include the use of wood and other hard but easily crafted metals. The overall climate of Earthsea is temperate, comparable to the mid-latitudes (over a distance of about 1800 miles) of the Northern hemisphere. There is a yearly transition from warm summers to cold and snowy winters, especially in northern islands like Gont and Osskil. In the southern regions of Earthsea it can be much warmer.