[Tagging] length=

François Lacombe fl.infosreseaux at gmail.com
Tue Jan 27 15:13:17 UTC 2015


Hi Mike,

I don't find it redundant since the length=* tag can give the real length
of a feature.
The way in OSM is only a (sometimes not precise) drawing of an existing
feature and can be different from the reality.

The wiki can be completed with such a nuance.

I personally recommend to use the length key while mapping street cabinets
as nodes.
http://wiki.openstreetmap.org/wiki/Tag:man_made%3Dstreet_cabinet


All the best

*François Lacombe*

fl dot infosreseaux At gmail dot com
www.infos-reseaux.com
@InfosReseaux <http://www.twitter.com/InfosReseaux>

2015-01-27 16:04 GMT+01:00 Mike Thompson <miketho16 at gmail.com>:

> I have noticed a "length" tag used on some linear ways [1]. It seems
> that this is redundant, as the length could be calculated from the
> geometry itself.  It could also be the source of future errors should
> someone split the way, for example to add more detailed tagging, such
> as varying smoothness.
>
> The length key does have a wiki page [2], but the page doesn't have
> much content.  Perhaps it is only intended for nodes?
>
> What do you think?  Should the length tag be used with ways and
> relations where the length can be calculated from the geometry itself?
> Am I missing something?
>
> MIke
>
> [1] https://www.openstreetmap.org/way/324078614
> [2] http://wiki.openstreetmap.org/wiki/Key:length
>
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