[Tagging] What is the role of "role=guidepost"

Marián Kyral mkyral at email.cz
Sat Apr 13 18:48:35 UTC 2019


Hi,


When I started mapping, someone told me that is good practice to set the 
role to guidepost. Despite that validators don't like it.

I think it could helps sometime. But I have no example for it.




Marián







---------- Původní e-mail ----------
Od: Volker Schmidt <voschix at gmail.com>
Komu: Tag discussion, strategy and related tools <tagging at openstreetmap.org>
Datum: 13. 4. 2019 12:11:19
Předmět: Re: [Tagging] What is the role of "role=guidepost" 
"
But your example is different. You put the function into the name field. For
me the role of an object tagged information=guidepost is exactly that, a 
guidepost.  I am sure I am missing something, otherwise it would not have 50
k uses.
I admit to being Overpass-ignorant. Can someone help me find examples, where
a guidepost in a route relation has a role that is neither <empty> nor 
"guidepost. 




On Sat, 13 Apr 2019, 11:09 ajt1047 at gmail.com(mailto:ajt1047 at gmail.com), <ajt
1047 at gmail.com(mailto:ajt1047 at gmail.com)> wrote:

"On 13/04/2019 09:52, Volker Schmidt wrote:
> I have only now detected this (optional?) role value in route relations.
> What's the purpose of this?
> Or put in other words: I have a node tagged with 
> "information=guidepost". What is the difference between inserting it 
> in a route relation with or without "role=guidepost"
>
Without a role you have no idea how a guidepost or route_marker relates 
to the route as a whole.  Does it tell you how to go to the next bit?  
Is it the start or the finish?  Is it something else?  Also, it's 
possible for one guidepost or route_marker to have different roles 
within different routes.

Here's one locally that I've tried to annotate with roles:

https://www.openstreetmap.org/relation/6563955
(https://www.openstreetmap.org/relation/6563955)

(see https://taginfo.openstreetmap.org/search?q=marker#roles
(https://taginfo.openstreetmap.org/search?q=marker#roles) for the 
usage of those tags, or lack of them).

I suspect that "role=guidepost" is someone doing the same thing, but 
only for guideposts.

Best Regards,

Andy



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