UTFGrid

UTFGrid parameters:
Center:     {"x": 121.58 ,"y": 31.22 }
Scale:     0.000034798367
View bounds:

•     Left bottom: {"x": 121.57 , "y":31.21 }
•     Right top : { "x": 121.59 , "y":31.23}

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