Layer Estimates:

Layer: Highway (ID:0)
Count: 655
Extent:

XMin: -8173951.13569807
YMin: 5051936.88445204
XMax: -7785399.97148133
YMax: 5294188.39602019
Spatial Reference: 102100 (3857)

Layer: Air_Mapped050917 (ID:1)
Count: 252
Extent:

XMin: -8158837.85670005
YMin: 5050201.87627958
XMax: -7791275.2909221
YMax: 5269078.0045737
Spatial Reference: 102100 (3857)

Layer: MBTA_Line (ID:2)
Count: 69
Extent:

XMin: -8013170.83081716
YMin: 5106859.51893094
XMax: -7860706.69568347
YMax: 5284294.04312088
Spatial Reference: 102100 (3857)

Layer: MBTA_point051017 (ID:3)
Count: 92
Extent:

XMin: -7993250.29580045
YMin: 5138734.57259953
XMax: -7861797.0548169
YMax: 5277534.01674303
Spatial Reference: 102100 (3857)

Layer: Rail_Mapped050117 (ID:4)
Count: 101
Extent:

XMin: -8167242.57510971
YMin: 5106493.40403778
XMax: -7815616.52831819
YMax: 5270251.11656198
Spatial Reference: 102100 (3857)

Layer: Highway_Comment_Table (ID:5)
Count: 2

Layer: Air_Comment_Table (ID:6)
Count: 0

Layer: MBTA_Line_Comment_Table (ID:7)
Count: 1

Layer: MBTA_Point_Comment_Table (ID:8)
Count: 0

Layer: Rail_Comment_Table (ID:9)
Count: 0