One of a number of Popeye shorts which were sent off to Asia in the 80's to undergo the infamous redraw and colorization process.
The name of the island is Cash and Canary. That's a play on both Cash and Carry businesses as well as the Canary Islands.
The sleight of hand with the map and secret photography was seen again, in a slightly different way, in the 1977 Bond film "The Spy Who Loved Me."