UTFGrid

UTFGrid parameters:
Center:     {"x": 121.79 ,"y": 31.08 }
Scale:     0.000013845813
View bounds:

•     Left bottom: {"x": 121.76 , "y":31.06 }
•     Right top : { "x": 121.81 , "y":31.11}

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