I found this bike route plotter:
http://bikeroutetoaster.com/
That allows import as a gpx/tcx, but, allows output as a csv. A collection of csv's would be very easy to plot together... Not that I've actually tried using the site but in theory...
@Backstop started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I found this bike route plotter:
http://bikeroutetoaster.com/
That allows import as a gpx/tcx, but, allows output as a csv. A collection of csv's would be very easy to plot together... Not that I've actually tried using the site but in theory...