Halloween is a holiday that has often been associated with maps… treasure maps, spooky house plans, escape routes, and trick-or-treat routes. I think it is also the holiday with the most spatial app maps. Useful Halloween maps include the No Trick Treats interactive map to identify houses handing out treats for kids with dietary restrictions, The Patch sites such as RosevillePatch created a map of the best neighborhood Halloween decorations in Roseville, CA and Benicia to let visitors add to the map. I tried to make my own tree map using Many Eyes from IBM to determine Halloween candy with the most bang for my buck. Looking at it though, it is more of a surefire way to get our house toilet papered —- handing out one Hershey’s Kiss per Trick or Treater. … but more candy for me after Halloween .