Final answer:
The first person to describe the Boston to Washington D.C. megalopolis as 'BosWash' cannot be ascertained from the provided texts, but the term 'megalopolis' was popularized by Jean Gottmann in 1961.
Step-by-step explanation:
The term BosWash megalopolis was not explicitly described by the individuals or texts referenced in the provided information. Therefore, it is not possible to accurately answer who first described the Boston to Washington D.C. megalopolis as BosWash, based solely on the given references. The concept of the megalopolis, a term coined in the 20th century, refers to a large urban area that encompasses several cities or regions that grow and merge. The term megalopolis was popularized by Jean Gottmann in his 1961 study of the northeastern seaboard of the United States.
Downtown Philadelphia's city hall exemplifies the urban complexity of the BosWash megalopolis, showcasing the growth and fusion of metropolitan areas along this northeast corridor. This progressive urban expansion symbolizes the deep historical roots and the ongoing social and economic developments linking these major cities.