Navigating using a gpx track


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HI all. I'm thinking of buying the new Rider 550 at present using Mobile App on my iPhone. One of the main reasons for buying the Rider 550 is the ability of planning a route / track on my computer using MyDrive and syncing to device. Something that the Mobile App sadly cannot do. If I plan a route which I do not want the Rider to alter then I use a track gpx rather than a route itn. Once the track is on the 550 and you start to navigate, what happens if you make a wrong turn and go off track ?

Sorry if this has been asked before but I did search and could not find anything.
 
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canderson

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You will be rerouted to the original track.
There are 3 flavors of *.gpx files. Unlike the 'waypoint' (similar to TomTom *.itn use) or 'route' styles, the 'track' style of *.gpx is VERY explicit in its directions, and is made up of a very dense set of points. It won't let you wander without notification.
 
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Excellent thats what I wanted to hear. So its like Garmin with route re-calculation turned off. So if you go off route the original route stays intact, you will have to get back on track yourself. If I want it to re-calculate a new route to destination then I would use a route itn file. Is that correct ?
 

canderson

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Ah, now that's a different question. If I recall correctly, when re-running an existing track *.gpx file, I believe the device will attempt to re-route you to the nearest point at which it can reconnect with your track.
Here's the difference if you use *.gpx vs. *.itn. It's been about a year since I've run a pre-designed *.gpx and tried to vary from the planned track.

The *.gpx track file provides zero latitude for your route. It wants you on that route no matter what. That means if there is a road closure or traffic or some other unpleasant blockage, it doesn't care. If there's a faster way, it doesn't care.

Using the *.itn file, the routing engine is allowed to select the best route for you from one waypoint to the next. If you deviate from an *.itn route, it will always do it's best to bring you to the shortest/fastest (however you are configured) means of achieving the next waypoint in the *.itn list. That takes into account traffic, normally expected road speeds, etc. If you deviate from its original plan enough, it may well come up with alternates as you go.
 
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Thank you so much for your detailed replies. It looks like it will work how I want it to work. Excellent.
 

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