Layer Estimates:

Layer: Building_Union (ID:0)
Count: 4769
Extent:

XMin: -9001388.2231
YMin: 4192725.2785
XMax: -8997552.9432
YMax: 4197643.0582
Spatial Reference: 102100 (3857)

Layer: Block_Union (ID:1)
Count: 359
Extent:

XMin: -9001398.6345
YMin: 4192662.7725
XMax: -8997402.5914
YMax: 4197651.0462
Spatial Reference: 102100 (3857)