public void TestArea() { var polygon = new Polygon(new LinearRing(new Coordinate[] { new Coordinate(125, -15), new Coordinate(113, -22), new Coordinate(154, -27), new Coordinate(144, -15), new Coordinate(125, -15), })); var a = Turf.Area(polygon); Assert.AreEqual(a, 3339946239196.927); }