Layer Estimates:

Layer: USA Intl Airports (ID:0)
Count: 20
Extent:

XMin: -122.374902196945
YMin: 25.7953696868603
XMax: -71.0064175908507
YMax: 47.449894617841
Spatial Reference: 4326 (4326)

Layer: USA Counties (over 1:3m) (ID:2)
Count: 3142
Extent:

XMin: -178.2175984
YMin: 18.9217862999998
XMax: -66.969271
YMax: 71.406235408712
Spatial Reference: 4326 (4326)

Layer: USA Counties (below 1:3m) (ID:3)
Count: 3220
Extent:

XMin: -179.14734
YMin: 17.881242
XMax: 179.778465
YMax: 71.3904820644059
Spatial Reference: 4326 (4326)