Layer Estimates:

Layer: 1990_Area_Tracts_With_Population_Density_Generalized (ID:0)
Count: 588
Extent:

XMin: -11110889.5217489
YMin: 3321607.61671522
XMax: -10753108.4819274
YMax: 3669862.56485298
Spatial Reference: 102100 (3857)