UTFGrid

UTFGrid parameters:
Center:     {"x": 121.61 ,"y": 31.19 }
Scale:     0.000007481419
View bounds:

•     Left bottom: {"x": 121.57 , "y":31.15 }
•     Right top : { "x": 121.65 , "y":31.23}

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