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This is the map of Nielen Designated Marketing Areas using D3.js. Hover over for data related to each area.

See map here

See code here


  • Map adapted from Mike Bostock's map example
  • Original topojson made by converting shapefile from here to topojson via Mike Bostock's instructions
    • Shapefile link is dead, an archived Geojson from Geocommons can be found here
  • Nielsen rank and TV data via tvb


  • Some areas are shaped really strangely (such as a slice of Nevada being part of the Denver media market) but that is really how they are divided