350 -> 360 = 0->10 : 360 is north as will as 0 .
so you need to add an element "Nord" again .try this function now :
function azimutHuman(ang) { //can be 0 - 360
var azimuthHumans = [
'Nord','Nord-NE','Nord-Est','Est-NE',
'Est','Est-SE','Sud-Est','Sud-SE',
'Sud','Sud-SO','Sud-Ovest','Ovest-SO',
'Ovest','Ovest-SO','Nord-Ovest','Nord-NO','Nord'];
return azimuthHumans[ Math.round(ang/22.5) ];
}