If anyone is curious, the tool we wrote for rendering raster map tiles on the fly for this project is open source: http://www.propublica.org/nerds/item/announci

If anyone is curious, the tool we wrote for rendering raster map tiles on the fly for this project is open source: http://www.propublica.org/nerds/item/announcing-raster-support-for-simple-tiles http://www.propublica.org/nerds/item/announcing-raster-suppo...