Willis Island Flag

Willis Island is one of the few inhabited islands of the Great Barrier Reef.  Note that this reef does indeed have habitable isles that people can live upon.  This Geographic flag reveals this Willis Island's Latitude and Longitude at: 149 Degrees East by 16 Degrees South.

The red, green, pink tribar colours are coded to numbers, based upon the order of the rainbow.  Red is 1, green is 4, and pink is 9; thus 149 Degrees East.  Also the central yellow pentagon indicates that this is in the Eastern Hemisphere. 

As for Latitude, the red and indigo stars read as 16 Degrees South.  Since the dominant red star is pointing downwards, we know it is a Southern Parallel. 

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Image Credit: Wikipedia
https://en.wikipedia.org/wiki/Willis_Island_(Coral_Sea)#/media/File:Willis_Island.JPG