[OSM-talk] Check my junctions - looking for someone to review my plates of spaghetti
Martijn van Exel
m at rtijn.org
Tue Jan 24 10:10:57 GMT 2012
Hi,
On Tue, Jan 24, 2012 at 3:52 AM, <dies38061 at mypacks.net> wrote:
> Over the past couple of months, I have armchair-mapped several highway junctions in the United States which are "commonly complex" in that they involve multiple turn restrictions, street name changes and pedestrian crossing placements.
>
> I would like to have some critique from someone experienced in mapping such junctions so that I ensure I am following current best practice and am not just creating a bunch of plates of unpalatable spaghetti.
>
> Two recent junctions are found in the following permalink views
> * http://www.openstreetmap.org/?lat=40.095879&lon=-75.296179&zoom=18&layers=M
> * http://www.openstreetmap.org/?lat=39.128273&lon=-77.237731&zoom=18&layers=M
>
Although the effort to map these intersections in detail is
commendable, I have to go with the previous responses in terms of
mapping practices. But instead of just reverting stuff as was also
suggested, I prefer to have a discussion here so we all learn
something. So definitely bring your questions here or to the tagging
list.
On turn restrictions: the turn restriction relation indicates, as the
name implies, restrictions on the directions you are allowed to turn.
You seem to want to indicate the direction of a turn lane with them,
which is not the appropriate use. In my view, there is a case to make
for appropriately using turn restrictions in this type of situation:
where connector lanes (_link) cross at level or join the main road, if
and only if a turn restriction is not implied (because of one_way
restrictions). See
http://www.openstreetmap.org/?lat=40.782409&lon=-111.910731&zoom=18&layers=M
for examples. Used like that,
http://www.openstreetmap.org/browse/node/728096876 could do with a
few.
--
martijn van exel
geospatial omnivore
1109 1st ave #2
salt lake city, ut 84103
801-550-5815
http://oegeo.wordpress.com
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