Layer Estimates:

Layer: census1940 (ID:0)
Count: 247
Extent:

XMin: -10085278.739764
YMin: 4634611.75110846
XMax: -10013680.0422249
YMax: 4703054.64950601
Spatial Reference: 102100 (3857)

Layer: census1950 (ID:1)
Count: 247
Extent:

XMin: -10085278.739764
YMin: 4634611.75110846
XMax: -10013680.0422249
YMax: 4703054.64950601
Spatial Reference: 102100 (3857)

Layer: census1960 (ID:2)
Count: 323
Extent:

XMin: -10100944.5695436
YMin: 4610299.3620792
XMax: -9973196.77836606
YMax: 4722044.91174609
Spatial Reference: 102100 (3857)

Layer: census1970 (ID:3)
Count: 414
Extent:

XMin: -10172070.445012
YMin: 4579442.47692542
XMax: -9973221.56635232
YMax: 4722020.92975269
Spatial Reference: 102100 (3857)

Layer: census1980 (ID:4)
Count: 437
Extent:

XMin: -10172070.445012
YMin: 4578833.24825767
XMax: -9922226.4006828
YMax: 4722020.9202275
Spatial Reference: 102100 (3857)