Cook received maps of Alaska, the Aleutians, and Kamchatka during a visit with Russian fur trader Gerasim Izmailov in Unalaska, and combined these maps with those of his expedition to create the first Mercator projection of the North Pacific.
Cook recibiu mapas de Alasca, as Aleutianas e Kamchatka, durante unha visita co comerciante de peles ruso Gerasim Izmailov en Unalaska, e combinado eses mapas cos da súa expedición creou a primeira proxección de Mercator do Pacífico Norte.