public void OnValueChanged(TMP_Dropdown dropdown)
        {
            m_ARMap.FreeMap();

            int value = dropdown.value - 1;

            // use embedded map
            if (m_EmbeddedMap != null && value == -1)
            {
                m_ARMap.m_MapFile = m_EmbeddedMap;
                m_ARMap.LoadMap();
            }
            else
            {
                if (value >= 0)
                {
                    SDKJob map = m_Maps[value];
                    LoadMap(map.id);
                }
            }
        }