Layer Estimates:

Layer: Mining Footprint Sites (ID:0)
Count: 428
Extent:

XMin: -18607992.5363
YMin: 7344419.7516
XMax: -14639529.8704
YMax: 10497425.1127
Spatial Reference: 102100 (3857)

Layer: MiningFootprint_polygons (ID:1)
Count: 428
Extent:

XMin: -18609271.6613
YMin: 7343749.0415
XMax: -14639472.5209
YMax: 10498113.9469
Spatial Reference: 102100 (3857)