Patching Viking to plan our bicycle vacation

This year, my girl friend and I spent our holidays in Tuscany. We decided that we needed some compensation for working in the office, so we booked a  bicycle tour, offered by  EuroBike, to compensate. As Eva wanted to go to  Tuscany, it was clear that it would be quite demanding for untrained people.

My experience with self-planned tours is that you can easily add 50% to the original distance by leaving the planned track inadvertently. Therefore I wanted to copy the rough route plan to my Garmin Oregon 300 GPS. I thought this would be easy by using cycle map on  http://www.openstreetmap.org/. But bad luck, coverage of Tuscany wasn't that good yet.

Having no digital maps, I tried to infer the coordinates of the relevant points on the printed map with the tour info. It turned out that this would take far too long to get the legs planned in time. So I hacked  Viking to support me with my planning.

Screenshot

Here is a screenshot of a small part of one leg (cropped/zoomed because of copyright). The coarse track is my originally planned track while the detailed track is the real GPX data from the tour. As you can see, the image is a bit off, but the accuracy was around 200 m for the whole tour. It was really quite helpful and useable.

Source code

The source code is up at  http://landschoff.net/git/?p=viking-image.git;a=summary and can be pulled from  git://landschoff.net/viking-image.git