As one who grew up in the Midwood zip code (11230) and went to Midwood HS, I always thought Midwood was a sub-section of Flatbush, which, in my own mind, was a large area bounded by McDonald Av on the west, Kings Highway on the south and southeast, maybe Utica Av on the east and somewhere between Empire Blvd and Eastern Parkway on the north, including the Parade Grounds in Prospect Park, while the Midwood section was inside it, with Foster Av on the north, Ocean Parkway on the west, Av M on the south, Nostrand on the east north to the Junction, and then Flatbush back to Foster. National Geographic, in an article on Brooklyn in the 1980's, claimed the area I lived in was called Ditmas Park. Frankly, I had never heard that term before that.