US Map of Nielsen Media Markets

This is an interactive map depicting the percentage of cable TV subscribers across the United States. The odd *puzzle pieces* as oppossed to standard state boundaries are Nielson Designated Marketing Area (DMA). With a few exceptions, DMA's are collections of county jurisdictions. I created the shapefile which stores these geographies by merging a U.S. counties file from the U.S. census bureau using QGIS. At the time, I was working in advertising, and this allowed me to combine statistical datasets from Nielson with a multitude of other datasets formatted along different boundaries.