Layer Estimates:

Layer: MBTA_NODE (ID:0)
Count: 170
Extent:

XMin: -7931854.19447695
YMin: 5192114.09440534
XMax: -7902721.62716656
YMax: 5226824.19885163
Spatial Reference: 102100 (3857)

Layer: MBTA_ARC (ID:1)
Count: 141
Extent:

XMin: -7931854.19447734
YMin: 5192113.92219268
XMax: -7902691.32093379
YMax: 5227052.06417981
Spatial Reference: 102100 (3857)