UTFGrid

UTFGrid parameters:
Center:     {"x": 121.82 ,"y": 31.11 }
Scale:     0.000002820653
View bounds:

•     Left bottom: {"x": 121.71 , "y":31.0 }
•     Right top : { "x": 121.93 , "y":31.21}

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