UTFGrid

UTFGrid parameters:
Center:     {"x": 121.59 ,"y": 31.21 }
Scale:     0.000013845813
View bounds:

•     Left bottom: {"x": 121.57 , "y":31.19 }
•     Right top : { "x": 121.61 , "y":31.23}

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