I have to correct myself: I thought OsmAnd really performed routing when navigating using a gpx trail. It doesn't, I tested it today. It translates turns in the track into screen messgaes and spoken text messages, without doing anything with the map. So it will send you into a ravine if your track goes there. But it can route you to the start of your track, and when you go off-track, it routes you back on track.
All the more reason why the gpx should be a correctly ordered single chain. Fr gr Peter Elderson Op di 20 aug. 2019 om 16:57 schreef Peter Elderson <pelder...@gmail.com>: > Andy Townsend <ajt1...@gmail.com>: > > On 19/08/2019 19:04, Peter Elderson wrote: > > > Ok, I accept I just don't know how it's done. So how is that done? How do > I tell my Garmin to guide me along, say, the Limes trail through the > Netherlands? > > Essentially, you'd just look at the screen and follow that! I tend to use > waypoints for an idea of things like "how long will it be until I get to > where I'm going to stop for lunch", not for "turn left here because route > XYZ turns left here", because you can see on the screen that route XYZ > "turns left here". > > > So it’s not done. The osm route is not used to route. You can see it and > keep yor dot on the line, but the navigating device does not navigate along > the route. It can navigate, it has the route, but it does not do it unless > I create gpx from the route, send that to the device, which then recreates > the route from the gpx. > > If you want to add a series of waypoints and route along those then you > can, but want you can't typically do with one of the hiking-oriented > Garmins is follow a particular feature. You could create an OSM-based > Garmin map that forced a device to route along a trail at the expense of > any other paths, but I certainly wouldn't want to do that as it would stop > me from leaving the trail to eat in a nearby town. > > > Nothing stops you from leaving the route, and I expect the device to route > me back to the track afterwards. And it does, and so does OsmAnd. > > Creating a Garmin route from a GPX file is possible, but probably > impractical, as you'd need to restrict the number of points. Apparently my > GPSMap 64 supports 200 routes with 250 points per route, and up to 5000 > waypoints in total. > > If only there were a way to store permanent routes in, say, a mapping > database, which could be used to determine what ways to follow... > > You only need to load the section(s) for the next day or a few days. > Afterwards, just remove them. No problem. I have had no problems to load > the via degli dei as 7 sections, each a day’s walk. No restrictions > necessary. > > I also loaded these in OsmAnd and had it guide me all the way > voice-in-ear, ie not having to look at the screen at all. > > Where Garmin on-device routing is really useful is for when you need to > get to somewhere but don't have an on-screen route to follow - for example > if the weather's turned and you need to abort a previously planned route > and get another route to your destination from where you currently are. > It's also useful where there are natural obstacles like rivers, where the > distance on foot may be significantly more than the as-the-crow-flies > distance. > > Best Regards, > > Andy > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > >
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