[OSM-talk] josm help?
aledmorris2 at gmail.com
Mon Jan 22 09:06:41 GMT 2007
mmkay... well if i have the choice, I am obviously going to keep everything
in a single way. It makes no sense to have to replicate all the attributes
of a way onto 4 additional segments, and keep them synchronized if, e.g. the
speed limit or road classification changes. Is there a webpage somewhere
detailing the arguments against this approach?
Also - the focus of OSM seems to be very much on producing beautiful
rendered maps. I don't know how much thought has been given to the needs of
a navigation system based on OSM data, but it seems to me that a
higher-level "logical road" grouping is needed in order to be able to give
proper turn instructions - basically, if multiple ways are part of the same
logical road, a navigation system should not give a turn instruction going
from one way to the next. (I guess currently, I would simply consider ways
with the same name as part of the same logical road)
On 1/21/07, Dean Earley <dean at earlsoft.co.uk> wrote:
> Tom Chance wrote:
> > Ahoy,
> > On Sunday 21 January 2007 21:02, A Morris wrote:
> >> How should I represent a roundabout with a road joining it. The road is
> >> split, so that the segments that actually join the roundabout are
> >> but the road itself is two-way.
> >> As far as I can tell, any key/value pairs apply to the whole way, not
> >> individual segments.
> > Have a way for the road approaching the roundabout. If the road branches
> > significantly with two one-way sections before reaching the roundabout,
> > create two ways, one for each branch. Connect each branch to a node on
> > roundabout. For the roundabout itself create a looped way the shape of
> > roundabout and give it the junction=roundabout tag.
> An alternative (Some people disagree with this method so use at your
> peril :) is to just select the segments (click and drag or alt+click)
> and apply oneway=yes to them alone and put them in the same way as the
> Dean Earley, Dee (dean at earlsoft.co.uk)
> irc: irc://irc.blitzed.org/
> web: http://personal.earlsoft.co.uk
> phone: +44 (0)780 8369596
> talk mailing list
> talk at openstreetmap.org
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