public double getCenterLongitude() {
        return getCenterLongitude(mLonWest, mLonEast);
    }
@Test
    public void testGetCenterLongitude() {
        assertEquals(1.5, BoundingBox.getCenterLongitude(1, 2), TOLERANCE);
        assertEquals(-178.5, BoundingBox.getCenterLongitude(2, 1), TOLERANCE);
    }