Layer Estimates:

Layer: Population by Block Group Centroid (ID:0)
Count: 21577
Extent:

XMin: -9297088.6717
YMin: 4376386.8552
XMax: -8315438.3787
YMax: 5197010.6706
Spatial Reference: 102100 (3857)

Layer: Dasymetric Block Groups 2014 5YR (ID:1)
Count: 21608
Extent:

XMin: -9314702.36332603
YMin: 4375286.37416449
XMax: -8314460.8558238
YMax: 5201412.93844425
Spatial Reference: 102100 (3857)

Layer: CDC SVI Census Tracts (ID:2)
Count: 7393
Extent:

XMin: -9314702.87540277
YMin: 4375284.4405923
XMax: -8314399.04852819
YMax: 5201490.55545367
Spatial Reference: 102100 (3857)

Layer: USC_SoVI_Tracts_2010_2014 (ID:3)
Count: 9303
Extent:

XMin: -9314702.82652643
YMin: 4375287.37286682
XMax: -8314397.52037687
YMax: 5201410.34241235
Spatial Reference: 102100 (3857)