[mkgmap-dev] question about ignored no_u_turn restriction

Sun Jul 5 20:20:48 BST 2015

Hi Anor,

Thanks for the tip but it seems that your suggestion breaks the OSM rule of
manipulating the map for specific renderers (the renderer here being
mkgmap). If the Garmin format truly doesn't support the u-turn restriction
with the same to and from way at an intersection, we should come up with
another solution.

Ben

On Sun, Jul 5, 2015 at 4:01 PM, A. Carlos <anorcarlos at hotmail.com> wrote:

>
>  Ben
>
> There I draw two routes, one in each direction, since there is a false
> median, then with 2-way, it's easy for a restriction
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> *_______________________________________________________________________________________________________*
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>  *Anor                                                              Co*
> *ncórdia SC *
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> ------------------------------
> Date: Sun, 5 Jul 2015 15:53:50 +0200
> From: ben at bagu.org
> To: mkgmap-dev at lists.mkgmap.org.uk
> Subject: Re: [mkgmap-dev] question about ignored no_u_turn restriction
>
>
> Hi Thorsten,
>
> Thanks for your reply. This type of restriction is probably a country
> specific thing. In Ontario Canada, you can make u-turns at intersections
> (regardless of the road is separation) if there is no sign indicating that
> you can't make the u-turn. Here's the information directly from the Ontario
> Ministry of Transportation:
>
> http://www.mto.gov.on.ca/english/dandv/driver/handbook/section2.6.11.shtml
>
> I realize that the link I sent previously is in the US but I suspect that
> it's the same policy there which is why the restriction is tagged like it
> is.
>
> Since the tagging seems to be valid, does the Garmin format support this
> type of restriction? If not then it's probably a good idea to indicate this
> in the warning message. Maybe the message should also be changed to an info
> message if there's no problem with the data. Does anybody have other
> insights?
>
> Thanks, Ben
>
> On Sun, Jul 5, 2015 at 2:47 PM, Thorsten Kukuk <kukuk at suse.de> wrote:
>
> On Sun, Jul 05, Ben Konrath wrote:
>
> > Does anybody know why this particular restriction is being ignored?
>
> Beside that this particular type of restrictions doesn't make
> any sense to me, I would guess the GARMIN format does not support it.
>
> If the to and from ways are the same, I have never seen a sign forbidding
> u-turns. Only, if you have two ways, structural seperated. But then I
> should tag the street that way and the restriction will not be ignored.
>
>   Thorsten
>
> --
> Thorsten Kukuk, Senior Architect SLES & Common Code Base
> SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nuernberg, Germany
> GF: Felix Imendörffer, Jane Smithard, Dilip Upmanyu, Graham Norton, HRB
> 21284 (AG Nürnberg)
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