Layer Estimates:

Layer: Rivers (ID:0)
Count: 55
Extent:

XMin: -9245829.6534
YMin: 4463330.0051
XMax: -8584915.8404
YMax: 4967662.6841
Spatial Reference: 102100 (3857)

Layer: Interstates (ID:1)
Count: 581
Extent:

XMin: -9464900.8029
YMin: 3846244.2706
XMax: -8265762.7489
YMax: 5168646.7682
Spatial Reference: 102100 (3857)

Layer: Incorporated Places (ID:2)
Count: 232
Extent:

XMin: -9196530.0389
YMin: 4471896.9745
XMax: -8652503.0699
YMax: 4957142.4888
Spatial Reference: 102100 (3857)

Layer: Counties (ID:3)
Count: 55
Extent:

XMin: -9199945.4263
YMin: 4467223.3706
XMax: -8651646.6939
YMax: 4959211.2845
Spatial Reference: 102100 (3857)