Cochin is a major port city on the south-west coast of India by the Arabian Sea and the Laccadive Sea and is part of the district of Ernakulam in the state of Kerala. It is often called Ernakulam, which refers to the mainland part of the city. With a corporation limit population of 612,343, and metropolitan population of 2.1 million, Kochi city is also a part of the Greater Cochin region and is classified as a Tier-II city by the Government of India. The civic body that governs the city is the Kochi Municipal Corporation, which was constituted in the year 1967, and the statutory bodies that oversee its development are the Greater Cochin Development Authority and the Goshree Islands Development Authority.