Kochi, also known as Cochin, is a major port city on the south-west coast of India by the Laccadive Sea. It is part of the district of Ernakulam in the state of Kerala and is often referred to as Ernakulam. 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, which is the largest urban agglomeration in Kerala 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 (GCDA) and the Goshree Islands Development Authority (GIDA).Kochi also known as the Queen of the Arabian Sea, was an important spice trading centre on the west coast of India from the 14th century onward, and maintained a trade network with Arab merchants from the pre-Islamic era. Occupied by the Portuguese in 1503, Kochi was the first of the European colonies in colonial India. It remained the main seat of Portuguese India until 1530, when Goa was chosen instead. The city was later occupied by the Dutch and the British, with the Kingdom of Cochin becoming a princely state. Kochi ranks first in the total number of international and domestic tourist arrivals in Kerala. Kochi has been ranked the sixth best tourist destination in India according to a survey conducted by the Nielsen Company on behalf of the Outlook Traveller magazine. Kochi was one of the 28 Indian cities found to be among the emerging 440 global cities that will contribute 50% of the world GDP by the year 2025, in a 2011 study done by the McKinsey Global Institute.