Layer Estimates:

Layer: Susquhanna_River (ID:1)
Count: 896
Extent:

XMin: -8775778.1551999
YMin: 4798784.60192343
XMax: -8340020.98610235
YMax: 5272587.30318779
Spatial Reference: 102100 (3857)

Layer: ChesapeakeShedsinPA (ID:2)
Count: 3
Extent:

XMin: -8794612.94804014
YMin: 4821379.37984443
XMax: -8390883.23446096
YMax: 5164936.29259472
Spatial Reference: 102100 (3857)

Layer: PACounties (ID:3)
Count: 67
Extent:

XMin: -8963373.3012
YMin: 4825317.2713
XMax: -8314406.1112
YMax: 5201433.1251
Spatial Reference: 102100 (3857)