[mkgmap-dev] [PATCH v5] - drive on left + roundabout direction checking

Wed Oct 21 15:22:23 BST 2009

Hi Toby,

> It might be an idea to report the erroneous ways using the 'browse' URL
> of that way.  For example:
>  <URL: http://www.openstreetmap.org/browse/way/34875101 >

It already reports an OSM download URL suitable for use in JOSM or a
web browser. I find that extremely useful for fixing the problems in
the data.

> And a question: does the roundabout checking deal with roundabouts made
> up of several ways (e.g. because of bridges)?

It will check the direction of any individual roundabout segment that
has at least 4 points whether it joins up with itself or not. So it is
still possible for segments (that have less than 4 points) to have the
wrong direction and not be flagged. I wonder why I didn't use 3 as the
minimum number of points required? I will test with 3 again and see
what happens.

Cheers,

Mark