Layer Estimates:

Layer: Contour Lines (ID:0)
Count: 87016
Extent:

XMin: -8894076.91586029
YMin: 5403011.83510979
XMax: -8863374.78394104
YMax: 5442971.24823175
Spatial Reference: 102100 (3857)
Vertical Spatial Reference: 5713 (5713)