On Mon, Apr 13, 2009 at 1:50 PM, Johann Gail <johann.gail@gmx.de> wrote:
Yes, I made the same observation. The highways gets drawn segment by segment. Therefore I introduced the switch --merge-lines, which should merge the segements.
Although drawing performance was definitely improved, a lot of routing issues cropped up when I tried this in the field. - The routing issues seem similar to those which occurred before Mark Burton committed the MAX_POINTS_IN_WAY = 200 patch. Could it be that merging the highways pushes the number of nodes above this limit? - I also noticed frequent recalculations while driving. I have the sensitivity patch applied. Is it possible that the smoothing algorithm causes the ways to diverge enough from the actual route to trigger a recalculation? (I set the --reduce-point-density option to the default.) - There was also a lot of weirdness in roundabouts. I was often routed the wrong way, or back and forth on the roundabout. Perhaps the merging is sometimes overzealous? Would it be a good idea to exclude roundabouts from smoothing and merging? Cheers.