But on most maps, Greenland looks almost as big as the entire ... It did a good job of showing countries' shapes and was excellent at showing ocean sailing courses, very important to merchants ...

Greenland’s current left-leaning ruling party, led by Prime Minister Mute Egede, has indicated staunch opposition to Trump.

The mineral-rich Arctic island is also home to a U.S. air base and straddles strategic air and sea routes in the North Atlantic.