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Wikipedia says:
Nuku alofa, population 22,400 (1996), is the capital of Tonga. The city is located on the coast of Tongatapu island, located at (-21.13333, -175.2). http://earth-info.nga.mil/gns/html/cntry_files.html
Nuku alofa is the most important commercial, transport and social centre of Tonga. It comprises about 35% of the Kingdom's population. The Tonga Royal Palace is located there. (...) more....
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