The 50-year spat over Hans Island has been resolved after the countries agreed to a partition of the island and the Labrador Sea, which separates Greenland and Canada.

The deal means that the Danish kingdom – of which Greenland is an autonomous territory – will be extended by an area the size of Jutland, Funen and Zealand combined.

Hans Island is a barren island around 1.3 square kilometres in size. Located between Greenland and Canada, it is symbolically significant for both countries.

Talks have been ongoing since a special focus group was appointed in 2018 in an effort to find a solution to the longstanding territorial dispute.

The agreement means a border will run from the north to the south of the island along a ridge, with one half being part of the Danish kingdom and the other Canadian territory.

Should Greenland ever become fully independent from Denmark, the Hans Island area would become part of Greenland, which is itself the world’s largest island.

In addition to partitioning Hans Island, the agreement also fixes a maritime border stretching a distance of 3,882 kilometres from the Lincoln Sea to the Labrador Sea. This border will be the world’s longest sea border and the most northerly part of the Schengen area.

One half of the area separated by the new sea border will also become part of Denmark’s territory.

The agreement was scheduled to be signed by the three countries at a ceremony on Tuesday. It must also be approved by the Danish parliament. This is expected to be a formality.

The dispute over the island has been ongoing since the 1970s but has always been peaceful.

In the 2000s, Denmark asserted its claims to the island on several occasions by raising the Danish flag and leaving a bottle of schnapps. Canada responded by leaving its own flag and a bottle of whisky.

The dispute has not affected the Inuit population of the area, who use the island for navigation purposes. It is known by the Thule people as Tartapaluk, meaning “kidney shaped”, while the name Hans comes from a Greenlandic hunter and expedition leader.