Map Your Moves [moritz.stefaner.eu] represents more than 4,000 geographical immigration and emigration patterns from over 1,700 people in a beautiful, interactive interface. The data was collected during an informal survey by WNYC, a New York based public radio station.
Each circle corresponds to a unique zip code area in New York. Its size indicates the number of moves to, or from, the area. Each circle actually consists of 2 overlaid circles: a red one for people moving out of a specific area, and a blue one for people moving into the area. Individual circles can be selected to inspect just the moves to or from this area. Clusters can be chosen by dragging a radial selection bubble around any group of circles.