This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Mackenzie River drainage basin. Approximate extent of the Mackenzie River watershed Longest river in Canada the Mackenzie River en Geo Swan en See also File Mackenzierivermap more recent map generally superior to this one My only concern is that at latitudes this far north Mercatro projection maps have considerable distortion