Layer Estimates:

Layer: Block_Groups_2010 (ID:0)
Count: 500
Extent:

XMin: -8669535.97100076
YMin: 4468934.21267156
XMax: -8590880.21376809
YMax: 4538834.43031106
Spatial Reference: 102100 (3857)

Layer: Tracts_2010 (ID:1)
Count: 201
Extent:

XMin: -8669386.40809674
YMin: 4469396.34031174
XMax: -8591302.40808313
YMax: 4538596.84037843
Spatial Reference: 102100 (3857)

Layer: Counties_2010 (ID:2)
Count: 3
Extent:

XMin: -8669386.28025362
YMin: 4469396.26588931
XMax: -8591302.33860535
YMax: 4538596.98628591
Spatial Reference: 102100 (3857)