UTFGrid

UTFGrid parameters:
Center:     {"x": 121.78 ,"y": 31.01 }
Scale:     0.000004139557
View bounds:

•     Left bottom: {"x": 121.7 , "y":30.94 }
•     Right top : { "x": 121.85 , "y":31.09}

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