As part of my work with Ramsey County Parks & Recreation back in 2010, I had to create some new symbols for certain recreational facilities which our parks had, but didn’t already exist in some other symbologies. So, I combined symbologies from the National Park Service, Minnesota DNR, and Three Rivers Park District with original symbols I created to produce a Minnesota Recreation Symbols set.
We turned it into a typeface, and shared it with all the participating Minnesota agencies for their use.