UTFGrid

UTFGrid parameters:
Center:     {"x": 121.6 ,"y": 31.25 }
Scale:     0.000006439898
View bounds:

•     Left bottom: {"x": 121.55 , "y":31.2 }
•     Right top : { "x": 121.65 , "y":31.3}

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