Here some information obaut how the route for this year Tour de France where created.
The core information is published of the site
www.letour.fr.That is basically a long list of cities, villages and road crossings. there is also an information on which road they are on. (Well all in French but thats how i grew up…)
Coordinates for this list of places are taken from a navigation programm, in this case Viamichelin.
This is the list you can find under the “Waypoints” folder in each stage.
The i use the driving directions from google earth to link the different places. So I do not even have to draw the track myself…
Finally i analyse the resulting track at
www.gpsvisualizer.com to find out the length of the track.
So basically I use different resources to combine the available information. Some being only available recently (driving directions from GE and GPSvisualizer).
To refine the work I upgraded to GE-Plus to be able to edit the resulting track within GE with more confort.