[Talk-GB] Conflation of TfL data into OSM (was: Is TfL data allowed on OSM?)

[Robert Skedgell]

I wouldn't necessarily support a full revert, as some of the traffic 
calming data (tables, humps and cushions) is useful and less likely to 
have changed since TfL surveyed them.

Cycle parking data may also be more likely to be correct, but it may 
have helped to have TfL's survey date imported as check_date, so that 
apps like StreetComplete could ask users to check whether it still 
exists. Hopefully something like that will still be possible without 
that extra tag.

Any nodes tagged as barrier=yes + access=no + bicycle=yes + foot=yes 
need those tags to be deleted ASAP. The fact that they were imported as 
barrier=yes shows that no attempt was made to ascertain the type of 
barrier from either TfL's survey photographs, Bing aerial imagery, or 
Mapillary. The access tags for an unknown type of barrier in an unknown 
situation may be correct, but only coincidentally.

In one case, TfL's surveyors recorded a position for an unspecified 
barrier (RWG065518, TRF_BARIER=TRUE) which was a few metres to the wrong 
side of an intersection. This resulted in a barrier=yes + access=no node 
on a one-way street. The actual situation is a rising bollard at the end 
of a pedestrianised section of the street.
https://www.openstreetmap.org/changeset/121096859

On 06/07/2022 11:41, Mateusz Konieczny via Talk-GB wrote:
> 
> 4 lip 2022, 23:08 od ajt1047 at gmail.com:
> 
>     Frankly, I'm struggling to find a way to reply to that suggestion in
>     a way that wouldn't (rightly) get me reprimanded by the list
>     moderators.
> 
> I would support full revert. For me large scale import, done without 
> addressing feedback
> raised by mappers is sufficient reason in itself.
> 
> Not doing this just encourages "lets import stuff and maybe it will stay 
> even if we
> violated rules"
> 
> Also, local mappers reported that they import outdated data, destroying 
> what was correctly
> mapped.
> 
> Maybe at least part of data can be usefully imported later?
> 
> Disclaimer: I am not a local mapper
> 
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