The following describes my experience generating an OpenLayers slippy map from GPS tracklogs using TileMill, TileCache, and Mapnik. I started by exporting my run data from Garmin Training Center and converting it from Garmin Training Center format (.tcx) to GPS
Running map
Three years of GPS track logs made into a slippy map. This little project was a lot more difficult than I thought it would be. It took a great deal of trial and error. I’ll follow up with a post