MacLean’s ‘Up on the Roof’ Inspires Rare Glimpse of New York City Did you ever wonder what was on the rooftops of New York City buildings? Alex MacLean’s book of photographs, “Up on the Roof: New York’s Hidden Skyline Spaces,” provides a wonderful glimpse of what the country’s largest metropolitan area looks like from the air. MacLean is not only an accomplished photographer, but also a pilot who has created a name for himself by taking aerial images from across the country, ranging from urban areas and city grids to the shapes and textures of fields in the Midwest. “Up…