Layer Estimates:

Layer: businesses_Boston (ID:0)
Count: 37484
Extent:

XMin: -7924322.5912
YMin: 5195541.8926
XMax: -7903070.5583
YMax: 5220362.5001
Spatial Reference: 102100 (3857)

Layer: Tracts with more than 100 Business (ID:1)
Count: 110
Extent:

XMin: -7924992.98414448
YMin: 5195105.11697957
XMax: -7902118.34524785
YMax: 5220541.3897379
Spatial Reference: 102100 (3857)

Layer: Boston_Tracts_Business (ID:2)
Count: 211
Extent:

XMin: -7925000.52921711
YMin: 5195097.09464511
XMax: -7902117.08660485
YMax: 5220751.02659867
Spatial Reference: 102100 (3857)

Layer: Boston_Tracts_Income_Spatial (ID:3)
Count: 210
Extent:

XMin: -7925000.52921711
YMin: 5195097.09464511
XMax: -7902117.08660485
YMax: 5220751.02659867
Spatial Reference: 102100 (3857)