Florian Lohoff escribió:

On Fri, Apr 23, 2010 at 06:31:42PM +0200, Carlos Dávila wrote:

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I think there are currently some tools in mkgmap to get a better time estimation. I have the lines below in my points style file, which certainly improve the arrival time estimation: highway=traffic_signals { add mkgmap:road-speed = '-2'; add mkgmap:road-speed-min = '1' }

I found the road speed stuff in the source already. It seems it is in the default style hardcoded by street type/classification which should be possible to override with some tag i think.

It can be overridden with --ignore-maxspeeds, but you'll need to change lines style with something like this (for each type of road): (highway=secondary | highway=secondary_link) & maxspeed>80 [0x04 road_class=3 road_speed=5 resolution 20] (highway=secondary | highway=secondary_link) & maxspeed>60 [0x04 road_class=3 road_speed=4 resolution 20] (highway=secondary | highway=secondary_link) & maxspeed>50 [0x04 road_class=2 road_speed=3 resolution 20] (highway=secondary | highway=secondary_link) & maxspeed<51 [0x04 road_class=2 road_speed=2 resolution 20] (highway=secondary | highway=secondary_link) [0x04 road_class=2 road_speed=4 resolution 20] The kind of road you describe in La Palma usually have some curvy or urban sections with actual maxspeed lower than the generic one for the road. If you tag them you'll get better time estimation. As an example of what I mean, you can have a look at [1] where I get quite accurate estimation on my nuvi. [1] http://www.openstreetmap.org/browse/relation/12953

And a maxspeed has nothing to do with what i hav a problem with. All the roads i travel dont have a maxspeed set, are primary and thus for the time calculation my GPSMap 60 takes something like 80 km/h - which on la palma is on some parts more than twice the actual speed one can travel ... An its nothing time dependent - its something which depends on the physics of the street - tight corners reduce the speed beeing traveled ...

Typical speed/ average speed would be more accurate ...