Unlike the arcs of soccer or basketball fields, which can be nightmares of geometry, the lines of baseball are straight and true.
Lines used to bracket a baseball field, to create the boundaries of its being, are formed by calcium carbonate. They do not occur naturally. They can be angled and re-angled as long as they are of regulation length. The boundaries are the essence of home field advantage.
In the days of Riverfront, the basepaths were still visible in football season, just as home plate was easily picked out during winter. One season always promised the next.