Layer Estimates:

Layer: Building_Footprints_from_DataSF_pulled_weekly__polygons (ID:0)
Count: 177023
Extent:

XMin: -13637872.0725072
YMin: 4537800.33033476
XMax: -13620790.59736
YMax: 4555710.78624923
Spatial Reference: 102100 (3857)