By Elyssa Goodman Originally from Washington Heights, Alex Corporan began skating in 1986. Even decades later, having worked with brands like Supreme (he was one of the brand’s first store managers) and Etnies, he’d still get blank stares and bewilderment when he mentioned skating a particular pump on a New York street corner or a curve by the river. He wanted to explain what it was like being a skater in New York City to people outside of that world, and the written word never seemed to cut it. He set out to make a book with full-bleed photos that could at least begin to sum up what it meant …