Layer Estimates:

Layer: BostonTracts1 (ID:5)
Count: 1185
Extent:

XMin: -8013456.87695348
YMin: 5103859.48423133
XMax: -7850185.07740511
YMax: 5418164.02047669
Spatial Reference: 102100 (3857)

Layer: BostonMetropolitanArea (ID:1)
Count: 3
Extent:

XMin: -8003734.799
YMin: 5096166.2587
XMax: -7828267.3403
YMax: 5399566.2625
Spatial Reference: 102100 (3857)

Layer: LanguagesSpokenBOSArea (ID:4)
Count: 1970