[Tagging] Waterway length

[Sergio Manzi]

Then why don't you submit a paper to the CNFG (http://www.cnfg.fr/) and correct the Wikipadia articles?

Sergio


On 2019-02-16 23:07, marc marc wrote:
> Le 16.02.19 à 22:32, Sergio Manzi a écrit :
>> A static value for a river length in OSM, without any information about 
>> its source
> every tag you add into osm have a changeset with a source tag, isn't it?
> so adding the lenght should/must also have a source (extrapolation (sum 
> of all way of a relation) of osm data is a source)
>
> a few month ago, I have checked the length of Rhône [1]
> the french wikipedia list 2 sources for the lenght... both are very fair 
> away of the lenght found after some work on osm data.
> which one to choose? osm without hesitation. maybe it is not fair but at 
> least it is verifiable (everyone can load the relationship, see the 
> result and correct errors if necessary) while the other 2 sources 
> (including the official French source) are totally unverifiable.
>
> unfortunately I did not send in osm the result of the cleaning because 
> it concerned partly errors in osm (mainly roles in the relationship)
> but I started by purging everything that didn't interest me in the 
> relationship before fixing. it will have to be done again
>
> [1] https://en.wikipedia.org/wiki/Rh%C3%B4ne
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