UTFGrid

UTFGrid parameters:
Center:     {"x": 121.64 ,"y": 45.31 }
Scale:     0.000007678297
View bounds:

•     Left bottom: {"x": 121.6 , "y":45.27 }
•     Right top : { "x": 121.68 , "y":45.35}

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