I wanted to take TileMill for a spin, so I used this data from the RI Data Hub to create this intensity map of kids under the age of 3 enrolled in Early Intervention programs in Rhode Island. Mouseover the dots for more information.
Here’s the spreadsheet I loaded into TileMill as a layer on this map. It’s a .CSV file.
Here’s the code I plugged into the free TileMill app to get this to work:
Here’s a post from the inimitable Brian Boyer, formerly of the Chicago Tribune News Apps team (and now of WaPo, I think): Make It Pretty With TileMill