Layer Estimates:

Layer: Center (ID:0)
Count: 3
Extent:

XMin: -8981604.70491887
YMin: 3315129.33418168
XMax: -292881.5803
YMax: 5402211.424
Spatial Reference: 102100 (3857)

Layer: ExtentBox (ID:4)
Count: 3
Extent:

XMin: -8981604.87023079
YMin: 3315127.6276528
XMax: -292825.920499999
YMax: 5402979.9249
Spatial Reference: 102100 (3857)