@siracusa @atpfm Correct use of “the mainland” spotted in this street atlas (John Tauranac, “Manhattan Block by Block”, 2005) that I picked up at a used bookstore over the weekend.
@kjhealy @siracusa @atpfm Except part of New York County (Manhattan) is also on the mainland. https://en.wikipedia.org/wiki/Marble_Hill,_Manhattan
Marble Hill, Manhattan - Wikipedia

A collection of sf objects and related tibbles for making maps of New York City

Simple features boundary files for New York City across various administrative and Census geographies.

@20002ist @kjhealy @siracusa @atpfm I'm surprised at the very small and specific area called "Upper East Side", which I'd consider encompass much more of the area between E96 and E59.
@kjhealy My old man lives on the Isle of Wight. All the islanders refer to “the ferry to the mainland” when talking about going to Southampton or Portsmouth. I always jokingly correct them: “You mean to the main island!” 🤣