UTFGrid

UTFGrid parameters:
Center:     {"x": 121.49 ,"y": 31.35 }
Scale:     0.000013845813
View bounds:

•     Left bottom: {"x": 121.47 , "y":31.33 }
•     Right top : { "x": 121.51 , "y":31.37}

•   Width: 256
•   Height: 256
•   PixcelCellCount: 8