[Tagging] How can I display maxspeed on my Garmin?

Warin 61sundowner at gmail.com
Fri Jul 22 04:02:32 UTC 2016

Garmins mapping has evolved over time. It is not open source nor do they 
release the commands etc that they use.
So things are reverse engineered to get Garmin maps from various sources 
(including OSM).
While maxspeed may be important for some .. it may not be high on the 
list of things to do for those doing the reverse engineering.
So in terms of getting it on your Garmin .. not now. But maybe in the 

On 7/22/2016 6:31 AM, Gerd Petermann wrote:
> Hi Dave,
> "there's no known way to simply append that tag to a label or highway 
> name. Correct?"
> no, I think that should be possible when the way has the maxspeed tag.
> I refered to a different feature which shows a road sign with the 
> maxspeed value
> and also allows to warn the driver when he is faster.
> Gerd
> ------------------------------------------------------------------------
> *Von:* Dave Swarthout <daveswarthout at gmail.com>
> *Gesendet:* Donnerstag, 21. Juli 2016 22:18:54
> *An:* Tag discussion, strategy and related tools
> *Betreff:* Re: [Tagging] How can I display maxspeed on my Garmin?
> Thanks for the responses.
> I assumed because we can append ref tags to a highway name one could 
> just do the same for maxspeed.  It's just another tag after all. 
> Obviously, there is a lot of interplay between mkgmap and the Garmin 
> internals that I don't understand.
> Gerd, what you're saying is that there's no known way to simply append 
> that tag to a label or highway name. Correct?
> Dave
> On Wed, Jul 20, 2016 at 11:11 PM, Gerd Petermann 
> <GPetermann_muenchen at hotmail.com 
> <mailto:GPetermann_muenchen at hotmail.com>> wrote:
>     Well,
>     the default style rules in mkgmap evaluate maxspeed to calculate a
>     so called road speed value which is used
>     by the Garmin routing algo.
>     But we don't know any way to store the value in the map so that it
>     woud show up in the device when you
>     pass the node. I know that modern Garmin maps have this feature
>     using so called NT maps, I don't know
>     any place in the older img format where this information could be
>     stored, but maybe we just didn't find
>     it yet.
>     Gerd
>     ------------------------------------------------------------------------
>     *Von:* Paul Johnson <baloo at ursamundi.org <mailto:baloo at ursamundi.org>>
>     *Gesendet:* Donnerstag, 21. Juli 2016 08:55:27
>     *An:* David Swarthout; Tag discussion, strategy and related tools
>     *Betreff:* Re: [Tagging] How can I display maxspeed on my Garmin?
>     On Tue, Jul 19, 2016 at 7:07 PM, Dave Swarthout
>     <daveswarthout at gmail.com <mailto:daveswarthout at gmail.com>> wrote:
>         I posted this on the Garmin OSM forum but nobody responded.
>         Maybe someone here can help with this.
>         I recently added maxspeed to many highways in my neighborhood
>         and am looking for a way to have them display on my Garmin
>         Montana. Mostly I would use this information while driving
>         here and there to show me roads that don't have a maxspeed tag
>         already. I'm looking for a style directive that will append
>         maxspeed information to the highway-symbol and ref for the
>         standard highway types.
>     I'm not currently aware of anything in the OSM to Garmin toolchain
>     that is capable of encoding maxspeed as of yet. As far as I'm
>     aware, the only data consumer that is using lane or speed data is
>     Osmand at this time.
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> -- 
> Dave Swarthout
> Homer, Alaska
> Chiang Mai, Thailand
> Travel Blog at http://dswarthout.blogspot.com
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