Hi,
WanMil wrote:
> attached patch forwards the "guessed" drive-on-left value in a thread
> safe way to the NOD header by using a ThreadLocal variable. This is a
> small code change.
> Anyhow this makes only sense if you think that the guess algorithm is
> ok.
Shouldn't it be a TRE header? Or TRE header too?
According to help for options, guessing is connected with
"check-roundabouts", which revers directions of roundabouts. This option
is wrong for tiles, that contain multiple countries with different
drive-on rules. In that case "check-roundabouts" would damage some good
roundabouts.
If you make a map for a single country, you don't need guessing. And you
can't invoke guessing for a map with multiple countries. So this
guessing feature looks rather redundant.
In my opinion there should be no guessing but a simple count. If a tile
has more than 50% of roundabouts as drive-on-left, then this tile should
be marked as drive-on-left. That way most of roundabouts would look
correctly when navigating.
Perfect solution would be to make tile splitting along country border.
But if we can't do that, then maybe we could get statistically best
settings for drive-on flags?
--
Best regards,
Andrzej
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