UTFGrid

UTFGrid parameters:
Center:     {"x": 121.54 ,"y": 31.33 }
Scale:     0.000006883282
View bounds:

•     Left bottom: {"x": 121.5 , "y":31.28 }
•     Right top : { "x": 121.59 , "y":31.37}

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