Layer Estimates:

Layer: BuildingFootprints (ID:0)
Count: 203806
Extent:

XMin: -8669006.6267
YMin: 4469886.7726
XMax: -8601082.4576
YMax: 4517315.157
Spatial Reference: 102100 (3857)

Layer: ImperviousAreas (ID:1)
Count: 158327
Extent:

XMin: -8669013.0465
YMin: 4469740.865
XMax: -8601428.7317
YMax: 4517675.0085
Spatial Reference: 102100 (3857)