Removing missing tile strategy.
Removing missing tile strategy.

YonatanKra/cesium,YonatanKra/cesium,jasonbeverage/cesium,kaktus40/cesium,likangning93/cesium,likangning93/cesium,geoscan/cesium,AnalyticalGraphicsInc/cesium,CesiumGS/cesium,CesiumGS/cesium,likangning93/cesium,likangning93/cesium,jasonbeverage/cesium,kaktus40/cesium,josh-bernstein/cesium,YonatanKra/cesium,CesiumGS/cesium,progsung/cesium,AnalyticalGraphicsInc/cesium,josh-bernstein/cesium,CesiumGS/cesium,YonatanKra/cesium,likangning93/cesium,CesiumGS/cesium,progsung/cesium,geoscan/cesium