[Talk-us] cardinal directions

Martijn van Exel m at rtijn.org
Wed Jan 18 14:59:04 UTC 2017


I am trying to be consistent with the outcome of the discussion that we had on talk-us a couple of years ago. Right now both are used (north/south/east/west as relation member role as well as direction on the relation tag) but the former is used way more often. That’s why I am suggesting going with the practice that has surfaced as the most popular, as well as the outcome of earlier discussion. 

Perhaps I am not understanding you correctly, but I am *not* suggesting to use tags on ways to indicate cardinal direction, just assign roles to relation members. Agreed that adding this type of info to ways makes it impossible to validate / maintain.

This also does not have to preclude having separate e/w or n/s relations + a super relation — I think that is actually good practice for big relations to keep them manageable.

Martijn van Exel

> On Jan 13, 2017, at 11:40 PM, Paul Johnson <baloo at ursamundi.org> wrote:
> 
> 
> 
> On Fri, Jan 13, 2017 at 3:42 PM, Martijn van Exel <m at rtijn.org <mailto:m at rtijn.org>> wrote:
> Hi all, 
> 
> Some of you may remember the discussion we had on tagging cardinal directions in the US, which led to the wiki page[1] describing the current practice.
> Basically the convention we arrived on is to tag relation members with role=north/east/south/west to indicate cardinal direction.
> This is backed up by usage in the US. About 75% of way members of Interstate road relations have directional role members[2].
> 
> Can we not do this?  Can this not be a thing?  Can we instead go route master and only have child relations have cardinal roles, with child ways being exclusively forward/backward?  Because cardinal directions on the ways themselves is 1) ambiguous AF and 2) breaks validation on a level that it can take hours to days for experienced editors to manually validate, and can't be automated as a result.
> 
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