@Test
public void testComputeN_v() throws Exception {

    final double cellSizeY = 180.0 / 2004.0;
    double lat;
    double isinGridRow = 1002.0;
    lat = cellSizeY * isinGridRow;
    assertEquals(2, LatLonToIsinGridMapper.computeN_v(lat));
    isinGridRow = 1001.0;
    lat = cellSizeY * isinGridRow;
    assertEquals(8, LatLonToIsinGridMapper.computeN_v(lat));
    isinGridRow = 1000.0;
    lat = cellSizeY * isinGridRow;
    assertEquals(14, LatLonToIsinGridMapper.computeN_v(lat));
    isinGridRow = 300.0;
    lat = cellSizeY * isinGridRow;
    assertEquals(3574, LatLonToIsinGridMapper.computeN_v(lat));
    lat = 0.0;
    assertEquals(LatLonToIsinGridMapper.N_eq, LatLonToIsinGridMapper.computeN_v(lat));
    isinGridRow = -300;
    lat = cellSizeY * isinGridRow;
    assertEquals(3574, LatLonToIsinGridMapper.computeN_v(lat));
    isinGridRow = -1001.0;
    lat = cellSizeY * isinGridRow;
    assertEquals(8, LatLonToIsinGridMapper.computeN_v(lat));
    isinGridRow = -1002.0;
    lat = cellSizeY * isinGridRow;
    assertEquals(2, LatLonToIsinGridMapper.computeN_v(lat));
}