超图FAQ: 1.百度地图：EngineType.BaiDu; 2.谷歌地图：EngineType.GoogleMaps; 3.iserver地图服务：EngineType.Rest 4.天地图等OGC标准服务：EngineType.OGC 5.超图云地图：EngineType.SuperMapCloud 6.在线MVT数据：EngineType.OpenMVTCache 7.OpenStreetMaps:EngineType.OpenStreetMaps
8.BingMaps:EngineType.BingMaps.
