There is a flag with a green maple leaf in the middle, with a circle around it. What does it represent?

Question

I've seen this flag at baseball parks, but I don't know that I've seen it anywhere else. It looks like the flag of Canada, except the leaf is green and it has the circle. Any idea what this is? I can't figure it out.

Answer 1

This is the City of New York Parks Department flag.

Answer 2

are you sure its green cuz Canada's flag is a red maple leaf on it....could it be possible?