UTFGrid

UTFGrid parameters:
Center:     {"x": 121.83 ,"y": 30.9 }
Scale:     0.000005039942
View bounds:

•     Left bottom: {"x": 121.77 , "y":30.84 }
•     Right top : { "x": 121.89 , "y":30.96}

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