A man in a white shirt, dark shorts and a red cap is standing in a small green rowboat with green oars, in the middle of what appears to be a shallow river, against a bank of tall dried grasses.
The man is outdoors
A shallow river implies outdoors.
Outdoors a man is standing in a rowboat.
In order for the man to be standing in a rowboat in the middle of the river with grass nearby, the man must be outdoors.