by mikesimpson » Mon Nov 04, 2013 4:46 pm
It simply can't be done. Each route's tiles are placed as offsets from the StartTile which has its bottom left corner at the lat/long set in the RouteProperties.xml file when you first create a route. This tile is the one with the name +000000+000000.bin - every other tile in the route is based on this tile. Within the tile, every object is shown as an offset from the bottom left corner of the individual tile with an X and Z position.
If the earth was perfectly flat and square, then it would be possible to calculate the amount to change tiles / assets positions to merge the routes, but the world is not flat (at least some people don't think so), so it just can't be done.
As Marc says, you can merge 2 routes with EXACTLY the same start position, but even then, the track would need to be relaid on one of the routes. There was a program on one of the European sites which attempted to merge the tracks.bin files, but I can't remember where it was, nor how successful this merge was.
Mike