Layer Estimates:

Layer: Major river name (ID:0)
Count: 219
Extent:

XMin: -156.691725875349
YMin: -53.9934330513942
XMax: 155.483976713055
YMax: 69.4712291927731
Spatial Reference: 4326 (4326)

Layer: Watershed boundary (ID:1)
Count: 42021
Extent:

XMin: -166.537045966298
YMin: -53.7208333334915
XMax: 180.0000000001
YMax: 83.2000000001999
Spatial Reference: 4326 (4326)