UTFGrid

UTFGrid parameters:
Center:     {"x": 121.62 ,"y": 31.18 }
Scale:     0.000005838197
View bounds:

•     Left bottom: {"x": 121.57 , "y":31.13 }
•     Right top : { "x": 121.68 , "y":31.23}

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