UTFGrid

UTFGrid parameters:
Center:     {"x": 121.59 ,"y": 31.1 }
Scale:     0.000004409887
View bounds:

•     Left bottom: {"x": 121.52 , "y":31.03 }
•     Right top : { "x": 121.66 , "y":31.17}

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