UTFGrid

UTFGrid parameters:
Center:     {"x": 121.56 ,"y": 31.15 }
Scale:     0.000006207882
View bounds:

•     Left bottom: {"x": 121.51 , "y":31.1 }
•     Right top : { "x": 121.61 , "y":31.2}

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