trainMapper is a command-line tool to generate KML files showing train journey routes.
A sample file is in stratford.yml, containing two lines (Stratford - Clapham Junction and Stratford - Bishop's Stortford).
Acquire three components:
Update include.php with the correct path information.
Firstly, get the coordinates:
cat lines.yml | php getCoordinates.php > coordinates
If trainMapper cannot find the coordinates for one or several of the stations, it will notify you. Correct the station articles on Wikipedia and re-run the command.
Secondly, generate the KML file:
cat coordinates.yml | php generateKml.php > map.kml
Finally, put map.kml on the web somewhere, and then you can enter the URL into Google Maps to display the stations with lines on the map.