Questions about importing .kurviger or .gpx files

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WolfgangS

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Dec 14, 2022, 3:36:16 AM12/14/22
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Good Morning Emux,

on the way to become a Cruiser user, questions arise ...

In the future, I will continue to plan my routes exclusively in kurviger.de and import them via Dropbox into Cruiser GL. To compensate for the small disadvantage of routing through BRouter instead of Kurviger, I set more shaping points. This changes at most a small section (to the next waypoint) if I initiate a recalculation, which happens extremely rarely.

I leave the setting of the additional shaping points to gpxshaping.de, because I am a lazy dog. I used to provide the resulting .gpx file to my TomTom/Garmin fellow riders anyway. Now I import it again into kurviger.de and create a more comprehensive .kurviger file.

Now I thought, why actually? The .gpx file and the .kurviger file are absolutely identical (see attachments), then I could take the .gpx file right away when importing the cruiser. But no - while the .kurviger variant imports perfectly, there are discrepancies in the .gpx - presumably due to the recalculation of the entire route. 
2022-12-14 07.43.41.png   2022-12-14 07.44.38.png

Now (finally) the questions: Why does the route have to be recalculated in the .gpx case, even though a route exists? Can I change that behavior with the import options? And why can the recalculation be omitted for .kurviger?

It is not a problem! I can live with my current approach, just would like to understand it; almost academic - right?

Thanks for an explanation!
SauerlachShp.gpx - RouteConverter.jpg
SauerlachShp.gpx
SauerlachShp _ Kurviger.jpg
SauerlachShp.kurviger

Willy

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Dec 14, 2022, 4:34:27 AM12/14/22
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Import the .kurviger file.
Export > navigation > gpx file (= navtrack)
Import > navigation > gpx file (= navtrack). 


Op woensdag 14 december 2022 om 09:36:16 UTC+1 schreef WolfgangS:
SauerlachShp.gpx

Emux

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Dec 14, 2022, 4:53:17 AM12/14/22
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Thanks for the support!


I created the kurviger format first in the app, so the app can save / restore offline the last route.
Then we offered it as an extra format in export / import, so users can save / restore their routes.

Cruiser can export and import offline Kurviger files.


A "regular" gpx file with the wpt / rte / trk sections only contains:
- Track geometry in <trk> section (as coordinates)
- Waypoints in <wpt> and <rte> sections
See also: https://en.wikipedia.org/wiki/GPS_Exchange_Format

However navigation needs much more data to work, like turn instructions, distances / times, etc.

So any routing app that imports "regular" gpx, in order to convert it to a route for navigation,
it needs to calculate the missing data, i.e. generate turn instructions, distances / times, etc.


BUT there is the GPX navigation track, an offline format compatible with GPX schema.
It is already used by many apps and websites, like Locus app and in RouteYou website.

With the GPX navigation format, can save / load offline the routes,
and provide them to other apps / devices, they read it as any GPX.


Cruiser can export and import offline GPX navigation files.

Select "Navigation" in the GPX export / import dialogs (see also here).

--

Emux

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Dec 14, 2022, 5:03:50 AM12/14/22
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Import offline your kurviger file and export offline as GPX navigation file (attached).

Then can import offline the GPX navigation file and navigate without recalculation!


(select "Navigation" in GPX import / export dialogs)

--
Emux
SauerlachShp_navigation.gpx

WolfgangS

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Dec 14, 2022, 6:37:39 AM12/14/22
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Thanks a lot Emux and Willy,
again what learned! 

In the navigation-gpx are still waypoints - will these be used in case of (initiated) re-calculations if off the given track? I guess: yes!

Is such a navigation-gpx compatible with TomTom/Garmin devices? I guess: no? 

Emux

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Dec 14, 2022, 6:57:35 AM12/14/22
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> In the navigation-gpx are still waypoints - will these be used in case of (initiated) re-calculations if off the given track?

Indeed, navigation gpx files contain everything navigation needs: waypoints, route, turn instructions, etc.
So any re-calculation in navigation will use these waypoints.


> Is such a navigation-gpx compatible with TomTom/Garmin devices?

They will probably read it as a regular gpx track.

--
Emux
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