UTFGrid

UTFGrid parameters:
Center:     {"x": 121.55 ,"y": 31.3 }
Scale:     0.00000359157
View bounds:

•     Left bottom: {"x": 121.47 , "y":31.21 }
•     Right top : { "x": 121.64 , "y":31.38}

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