Layer Estimates:

Layer: Allegheny County Rivers (ID:0)
Count: 4
Extent:

XMin: -8931181.4141
YMin: 4894225.0249
XMax: -8870913.125
YMax: 4963736.2813
Spatial Reference: 102100 (3857)

Layer: Municipalities and Neighborhoods (ID:1)
Count: 219
Extent:

XMin: -8946562.37537854
YMin: 4892850.87863737
XMax: -8869510.50167593
YMax: 4965600.97164099
Spatial Reference: 102100 (3857)