maemo.org - Talk - View Single Post - [Announce] modRana: a flexible GPS navigation system

	Ken-Young	2012-07-23 , 00:29
	Posts: 387 \| Thanked: 1,700 times \| Joined on Feb 2010 @ Cambridge, MA, USA	#1096

Originally Posted by MartinK

[...]
Automatic rerouting
ModRana now automatically reroutes if you leave the from the route.

How does it work ?
While following a route, modRana checks every 5 seconds the distance from all line segments that the route consists of and remembers the minimum distance. If the minimum distance is more than a given threshold (30 meters by default, can be changed in options->Navigation->Rerouting),
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Thanks for adding automatic rerouting. Rather than using a fixed distance to trigger rerouting, would it not make sense to adjust the trigger radius based on the Horizontal Dilution Of Precision (HDOP)? If the trigger were, for example, 3 x HDOP then the program would automatically increase its tolerance for being off-route when the quality of the location information degraded. That seems to me to be the right behavior.

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