On the globe these Mercator meridians are curved, coming closer and finally to a point at the poles, and your straight line becomes a curved one, giving a longer distance to cover.
Kwiglobhu eziMeridiyane zaseMekhetha zigotyiwe zisiza kufuphi kwaye ekugqibeleni zikhombe ezipalini kwaye nomgca wakho othe tyaba ngogobileyo unika udibaniso lomgama omde