^ This is part of the case for larger parks downtown or in the nearby urban core of 50, 100 or more acres.
That's… a
lot of space to take out of an urban area. The infield at Daytona (where they're holding Rockville) not including the lake is 180 acres. I decided to try and map out how much downtown land you'd need to assemble a continuous 180-acre parcel:
This, according to Google Maps, is 180 acres, or 4.6 square miles. It would require incorporating Shipyards West Park, Berkman Plaza 2, the Jail & Police Memorial Building, Sulzbacher, six blocks of the Cathedral District, the Historic Society, MOSH Genesis, the Four Seasons & Shipyards development, the existing Metropolitan Park, the Veterans Memorial, Lots J, D, P, M, E, Daily's Place, WJCT, the ponds next to Lot J and WJCT, and the little railcar housing on Adams St. You'd have to leave all of that as empty as the Daytona infield in order to try to maintain an equivalent amount of space.