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

Dave Swarthout daveswarthout at gmail.com
Thu Jul 21 20:18:54 UTC 2016

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?


On Wed, Jul 20, 2016 at 11:11 PM, Gerd Petermann <
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>
> *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>
> 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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