UTFGrid

UTFGrid parameters:
Center:     {"x": 121.72 ,"y": 31.07 }
Scale:     0.000013845813
View bounds:

•     Left bottom: {"x": 121.7 , "y":31.04 }
•     Right top : { "x": 121.75 , "y":31.09}

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