UTFGrid

UTFGrid parameters:
Center:     {"x": 121.68 ,"y": 31.22 }
Scale:     0.000001972123
View bounds:

•     Left bottom: {"x": 121.52 , "y":31.06 }
•     Right top : { "x": 121.83 , "y":31.37}

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