[Routing] Routing on Garmin etrex using OSM

[Karl Newman]

On Mon, Apr 14, 2008 at 9:47 AM, Robert (Jamie) Munro <rjmunro at arjam.net>
wrote:

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> Marcus Wolschon wrote:
> | Mark Williams schrieb:
> | | Hi,
> | |
> | | good start on this - I was looking at the problem over the weekend.
> | |
> | | I'm starting at the bottom of the XML learning curve here, but are
> your
> | | defaults assuming untagged ways are (barely) navigable? This could be
> | | entertaining if so...
> |
> | Untagged ways may be anything. From woodland, power-lines or rivers
> | up to foot-ways.
> | Only ways tagged with the highway-tag are navigatable.
>
> For a mobile device, I'd like it to route over untagged ways, then when
> I reach an untagged (or FIXME or unnamed) way, the device should notify
> me (it should say something like "turn left into untagged way"), and I
> could tag it, or voice annotate it (if I am driving and don't want to
> stop). If I can't go that way, then I should be able to press a shortcut
> key to tell it, and it should quickly recalculate an alternative route.
>
> I don't think it is likely to route me along a power line because power
> lines don't connect with roads - they just cross over one another. It
> may try and route me between two untagged level crossings on an untagged
> railway, but I don't think that will happen very often. If it does, the
> data needs to be found and fixed. If I am routed over it, I will have
> found it :-).
>
> Some people, e.g. truck drivers, will need more conservative routing -
> they don't want to go anywhere that isn't definitely big enough to take
> a truck, but as an OSM editor, I'd like my routing algorithm to take me
> past or through as many unmapped areas of the map as possible so that
> the map will be continuously improved. If I get stuck, I just tag the
> way as impassable, turn around and follow the new route.
>
> Robert (Jamie) Munro
>

I think we'll call that the "fill-in-the-blanks" mode. :-) My contribution
to this discussion was about Garmin GPS devices, which don't have the
capabilities you describe (to notify you about an untagged way or to press a
key to ignore a particular route). The tool I'm working on writing could
certainly be instructed to make untagged ways as routable, though, and you
could probably make it have a name of "FIXME" or something like that.

Karl
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