Layer Estimates:

Layer: Mylar_Mine_Portals_and_Seam_Elevations (ID:0)
Count: 11218
Extent:

XMin: -8967774.26464487
YMin: 4822886.7132251
XMax: -8426552.81287017
YMax: 5117505.38068594
Spatial Reference: 102100 (3857)