Layer Estimates:

Layer: Buildings_15Min (ID:0)
Count: 2180
Extent:

XMin: -13643783.7722
YMin: 5701632.2208
XMax: -13641156.0064
YMax: 5704870.7263
Spatial Reference: 102100 (3857)

Layer: Buildings_30Min (ID:1)
Count: 8447
Extent:

XMin: -13643794.5736
YMin: 5699891.6232
XMax: -13639293.235
YMax: 5706403.0073
Spatial Reference: 102100 (3857)