Layer Estimates:

Layer: Priority Tracts (ID:1)
Count: 21
Extent:

XMin: -7966007.12584104
YMin: 5172376.86928751
XMax: -7895082.8617077
YMax: 5267987.36877705
Spatial Reference: 102100 (3857)

Layer: Census Tracts (ID:2)
Count: 1040
Extent:

XMin: -8003859.67939748
YMin: 5103559.67321449
XMax: -7849097.24402062
YMax: 5294988.48332227
Spatial Reference: 102100 (3857)

Layer: Greater Boston Area (ID:3)
Count: 147
Extent:

XMin: -8003859.67939684
YMin: 5103559.67321449
XMax: -7849097.24402221
YMax: 5294988.48318552
Spatial Reference: 102100 (3857)