[Tagging] using Michelin's road classification (was: Routing in Liège)
a.pirard.papou at gmail.com
Thu Sep 15 15:02:44 UTC 2016
On 2016-09-13 18:21, Marc Gemis wrote:
> I was contacted by a mapper from Germany with whom I worked on turn:lanes.
> He has to following question, can someone with local knowledge inform
> us about the road classifications ? I have the impression a lot of
> streets are indeed residential. Feel free to reply in French, I'll
> translate it to English for him.
> Now I want ask you about another problem.
> Coming from here
> I checked Liege to find out the mapping of roads there:
> My guess is, that unclassified is used wrong there and that is the
> reason for strange routings. My opinion is that unclassified as the
> lowest kind of connecting roads do not end at city borders and have or
> need common connection to same or higher class inside of towns or
> villages. For me routers should avoid residentials and lower as much
> as possible. Do you have any idea to check and correct this in Liege
> to make routing better?
> If there are any questions, please ask.
> Michael aka hurdygurdyman
In order to produce good routing using the *main* roads (1), ...
why not adopt in OSM the same classification as Michelin
They should know something about routing, shouldn't they?
Inside town, the main advantage is that streets are then classified as
either secondary/tertiary or residential/unclassified
according to whether they should be used or not for routes from town
place to place.
Please note that when a street is promoted to tertiary status, the fact
that it contains houses gets disregarded
(and hence I wonder if it's a good idea to consider houses for road
classification rather than using an additional residential attribute
(yes, I know it's the way "we" do it)).
I am willing to explain JOSM users how to compare OSM and Michelin easily.
Please send me a *private **reply* to the next message "Michelin info"
to get it.
I would do a part of Liège myself if it's organized by someone
distributing the tasks.
(1) several de-contributors claim loudly that OSM routing is an every
contributors' hoax; I tend to agree with them for routing finer than
main roads given the complexity of making a no-turn relation, the
general misunderstanding of access restriction rules ("bicycle=yes"
alone), etc.; but I hate the "we don't do it like that" answers without
any constructive remark towards my goal when I suggest improvements.
The "dedicated" subject alone makes whole chapters just because the
"dedicated" concept is not an (already existing) access restriction but
a reason for one ("but "we" do it like that").
(2) I suppose that Michelin doesn't mind just that since they updated
OSM themselves in their 2012 experiment
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Tagging