var arc_map = new Datamap({
element: document.getElementById("arc_map"),
...
});
arc_map.arc(
[
{ origin: 'USA', destination: 'RUS'},
{ origin: 'USA', destination: 'DEU'},
{ origin: 'USA', destination: 'POL'},
{ origin: 'USA', destination: 'JAP'},
{ origin: 'USA', destination: 'AUS'},
{ origin: 'USA', destination: 'BRA'}
],
{ strokeColor: '#2BA587', strokeWidth: 1}
);