Hagstrom Maps, which has been merged/gobbled up/whatever, was by far the best that showed where railroad tracks were in both cities and towns, and, they did label the owner, though at times outdated (maps of New York and New Jersey showed the Northeast Corridor in some cases owned by Penn Central and ConRail, who have not been owners of it since 1976). These minor errors were inconsequential because the attention to accurate detail of the rail line's relationship with surounding streets and highways, parks, cemetaries, landmarks and important buildings, made it very easy to locate and to know where everything was. Yards and connecting spurs that lay unused for decades were included.
And stations!!! Very handy if you were either new or unfamiliar with a town that you're taking a train into, so that one could orient him or herself and know where to walk, or how far away something is from that station. Also, great help in assisting someone who plans to pick you up. Many printed maps simply omitted anything rail, as if it didn't exist (no doubt reflecting the values of the map printing company's ideology that people do not or should not ride trains).
Now even though as i said, Hagstrom has been bought out however, Google it and whatever company runs it now still prints them in the style they were known for. I bought a bunch a few years ago over the internet to keep my maps current and were mailed to me.