String getFileName(double lat, double lon) {
        int lonInt = getMinLonForTile(lon);
        int latInt = getMinLatForTile(lat);
        return toLowerCase(getNorthString(latInt) + getPaddedLatString(latInt) + getEastString(lonInt) + getPaddedLonString(lonInt));
    }
@Disabled
    @Test
    public void testGetEleHorizontalBorder() {
        // Border between the tiles n42e011 and n42e012
        assertEquals("n42e011", instance.getFileName(42.1, 11.999999));
        assertEquals(324, instance.getEle(42.1, 11.999999), precision);
        assertEquals("n42e012", instance.getFileName(42.1, 12.000001));
        assertEquals(324, instance.getEle(42.1, 12.000001), precision);
    }