Layer Estimates:

Layer: Air (ID:0)
Count: 762
Extent:

XMin: -8170960.20488671
YMin: 5050201.87602076
XMax: -7791275.2909221
YMax: 5269078.0045737
Spatial Reference: 102100 (3857)

Layer: Highway (ID:1)
Count: 1618
Extent:

XMin: -8175648.31864124
YMin: 5050204.14374535
XMax: -7785045.11008927
YMax: 5294188.39591003
Spatial Reference: 102100 (3857)

Layer: MBTAStations (ID:2)
Count: 146
Extent:

XMin: -7993130.31664635
YMin: 5131520.99289894
XMax: -7861974.068191
YMax: 5277421.90545626
Spatial Reference: 102100 (3857)

Layer: RailLines (ID:3)
Count: 107
Extent:

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

Layer: RailStations (ID:4)
Count: 12
Extent:

XMin: -8084793.96887751
YMin: 5109594.70785093
XMax: -7823327.63099792
YMax: 5249141.85826037
Spatial Reference: 102100 (3857)

Layer: RegionalTransit (ID:5)
Count: 16
Extent:

XMin: -8185691.6833629
YMin: 5046500.43841912
XMax: -7781075.43875999
YMax: 5294988.54449655
Spatial Reference: 102100 (3857)

Layer: MBTALines (ID:6)
Count: 145
Extent:

XMin: -8013156.55449999
YMin: 5054569.99903682
XMax: -7796124.30519698
YMax: 5281766.2033001
Spatial Reference: 102100 (3857)

Layer: Highway_Comment_Table (ID:7)
Count: 18

Layer: Air_Comment_Table (ID:8)
Count: 1

Layer: MBTA_Lines_Comment_Table (ID:9)
Count: 1

Layer: MBTA_Stations_Comment_Table (ID:10)
Count: 2

Layer: Rail_Lines_Comment_Table (ID:11)
Count: 2

Layer: Rail_Stations_Comment_Table (ID:12)
Count: 0

Layer: Regional_Transit_Comment_Table (ID:13)
Count: 0