UTFGrid

UTFGrid parameters:
Center:     {"x": 121.78 ,"y": 30.99 }
Scale:     0.000027691626
View bounds:

•     Left bottom: {"x": 121.76 , "y":30.98 }
•     Right top : { "x": 121.79 , "y":31.0}

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