I: ArcGIS:
  I.1: ArcGISTiledMapServiceLayer
    https://services.arcgisonline.com/arcgis/rest/services/World_Street_Map/MapServer
  I.2: ArcGISDynamicMapServiceLayer
    https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer ---(WKID error)
    https://server.arcgisonline.com/ArcGIS/rest/services/Specialty/Soil_Survey_Map/MapServer
  I.3: ArcGISImageServiceLayer
    http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/World/MODIS/ImageServer
    https://sampleserver6.arcgisonline.com/arcgis/rest/services/NLCDLandCover2001/ImageServer ---(WKID Error)
    https://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Earthquakes/SanAndreasLidar/ImageServer ---(WKID Error)


II: OpenStreetMapLayer


III: WebTiledLayer:
  III.1: http://{subDomain}.tile.opencyclemap.org/cycle/{level}/{col}/{row}.png 
    ---subdomains: a,b,c
  III.2: http://{subDomain}.tianditu.com/DataServer?T=ter_c&X={col}&Y={row}&L={level}
    --- subdomains: t0,t1 
    --- tileInfo:{"dpi":90.7142857142743,"rows":256,"cols":256,"compressionQuality":0,"origin":{"x":-180,"y":90},"spatialReference":{"wkid":4326},"lods":[{"level":2,"levelValue":2,"resolution":0.3515625,"scale":147748796.52937502},{"level":3,"levelValue":3,"resolution":0.17578125,"scale":73874398.26468751},{"level":4,"levelValue":4,"resolution":0.087890625,"scale":36937199.132343754},{"level":5,"levelValue":5,"resolution":0.0439453125,"scale":18468599.566171877},{"level":6,"levelValue":6,"resolution":0.02197265625,"scale":9234299.783085939},{"level":7,"levelValue":7,"resolution":0.010986328125,"scale":4617149.891542969},{"level":8,"levelValue":8,"resolution":0.0054931640625,"scale":2308574.9457714846},{"level":9,"levelValue":9,"resolution":0.00274658203125,"scale":1154287.4728857423},{"level":10,"levelValue":10,"resolution":0.001373291015625,"scale":577143.7364428712},{"level":11,"levelValue":11,"resolution":0.0006866455078125,"scale":288571.8682214356},{"level":12,"levelValue":12,"resolution":0.00034332275390625,"scale":144285.9341107178},{"level":13,"levelValue":13,"resolution":0.000171661376953125,"scale":72142.9670553589},{"level":14,"levelValue":14,"resolution":0.0000858306884765625,"scale":36071.48352767945},{"level":15,"levelValue":15,"resolution":0.00004291534423828125,"scale":18035.741763839724},{"level":16,"levelValue":16,"resolution":0.000021457672119140625,"scale":9017.870881919862},{"level":17,"levelValue":17,"resolution":0.000010728836059570312,"scale":4508.935440959931},{"level":18,"levelValue":18,"resolution":0.000005364418029785156,"scale":2254.4677204799655},{"level":19,"levelValue":19,"resolution":0.000002682209014892578,"scale":1127.2338602399827},{"level":20,"levelValue":2,"resolution":0.000001341104507446289,"scale":563.6169301199914}]}</li>


IV: VETiledLayer
  bingMapsKey: goto https://www.bingmapsportal.com/Application
