if ((m_zoomLevel >= MapEngine::MIN_ZOOM_LEVEL) && (m_zoomLevel <= MapEngine::MAX_ZOOM_LEVEL) &&
(m_tileNumber.x() >= 0) && (m_tileNumber.x() <= pow(2, m_zoomLevel) -1) &&
(m_tileNumber.y() >= 0) && (m_tileNumber.y() <= pow(2, m_zoomLevel) -1)) {
if ((m_zoomLevel >= MapEngine::MIN_ZOOM_LEVEL) && (m_zoomLevel <= MapEngine::MAX_ZOOM_LEVEL) &&
(m_tileNumber.x() >= 0) && (m_tileNumber.x() <= pow(2, m_zoomLevel) -1) &&
(m_tileNumber.y() >= 0) && (m_tileNumber.y() <= pow(2, m_zoomLevel) -1)) {