UTFGrid

UTFGrid parameters:
Center:     {"x": 121.59 ,"y": 31.04 }
Scale:     0.000006434552
View bounds:

•     Left bottom: {"x": 121.54 , "y":31.0 }
•     Right top : { "x": 121.64 , "y":31.09}

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