UTFGrid

UTFGrid parameters:
Center:     {"x": 121.81 ,"y": 31.03 }
Scale:     0.000055383252
View bounds:

•     Left bottom: {"x": 121.8 , "y":31.02 }
•     Right top : { "x": 121.82 , "y":31.03}

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