[Tagging] Navaid relation?

[Peter Elderson]

>  Id imaging a relation which says
> object A -> car -> Node B (on routable graph)
> So whenever i tell my nav software to bring me to object A the node
> selected on the routable graph as a destination will be Node B.

One relation per mode of transport then? So a complex obejct a could have
many navaid relations? Or one relation containing all nodes, with roles for
transport mode?
Vr gr Peter Elderson


Op wo 22 mei 2019 om 10:02 schreef Florian Lohoff <f at zz.de>:

> On Wed, May 22, 2019 at 08:31:03AM +1000, Graeme Fitzpatrick wrote:
> > On Wed, 22 May 2019 at 07:47, Florian Lohoff <f at zz.de> wrote:
> > > - Houses which are routeable by road a but are near road b or vice
> > >   versa.
> >
> > That could be a "problem" due to GPS (?) system being so accurate?
>
> And map data beeing very accurate. With commercial data sets you'll map
> addresses to street segments. Done.
>
> We aim much higher. We want exact locations of buildings and we expect
> some clever algorithms to match these addresses to roads. Works for
> 90% of the cases. And fails in others.
>
> And then we aim even higher. We want all the corner cases to work.
> Issues as the above - Address on road A - Reachable only via road B but
> near road A. Without hinting there is no way an algorithm will be able
> to determine this.
>
> > For instance, where I am sitting now at the back of my house, various
> GPS /
> > location / navigation systems tell me that I am actually at the address
> > behind us, of That Road, rather than My Street, because I'm about 1m
> closer
> > to that street!
> >
> > If I turn OSMand on & ask it to take me from my present location to my
> > Home, it will tell me to walk or drive around the block!
>
> Its not an GPS issue - Navigation works different - You tell where you
> want to go and it selects a precise and explicit point on the routing
> graph where to take you to. And it'll follow on the graph to that
> location. The mapping of an address to a location on the routeable
> graph is the Problem - not the routing/gps. This is why i called
> it "navaid" not "routingaid".
>
> Id imaging a relation which says
>
> object A -> car -> Node B (on routable graph)
>
> So whenever i tell my nav software to bring me to object A the node
> selected on the routable graph as a destination will be Node B.
>
> Flo
> --
> Florian Lohoff                                                 f at zz.de
>         UTF-8 Test: The 🐈 ran after a 🐁, but the 🐁 ran away
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