[OSM-talk] Planned revert of added surface and tracktype tags without local knowledge in various countries

[Florimond Berthoux]

I see no big issue of using only aerial images to set track_type or surface.
You can get a fairly good result with such sources.
So no, you should not blindly revert its modifications.
If the estimation was really bad almost all the time why not, but here the
example given is ok.

Le sam. 18 juil. 2020 à 12:56, Michael Reichert <osm-ml at michreichert.de> a
écrit :

> Hi,
>
> while reviewing changes in my local area, I discovered that user Modest7
> has been adding tracktype=* tags to lots of highway=track at various
> locations. I asked him what sources he used apart from the satellite
> imagery mentioned in the imagery_used=* tag of his changesets. See
> https://www.openstreetmap.org/changeset/87236896 for a discussion with
> him.
>
> I do not believe that one can add reliable tracktype=* information from
> satellite imagery without having some ground truth knowledge in order to
> know how to interpret the imagery in that region. Adding estimated
> tracktype=* does not help OSM on the long term. People how rely on the
> information (e.g. some wanting to drive or cycle on that track) are
> disappointed about this low-quality OSM data. Mappers who decide where
> to map assume these roads to be mapped properly. IMHO, adding
> fixme=resurvey tracktype will not improve it. Data consumers usually do
> not use tags like fixme=* In the case of imports (another type of mass
> editing), we say that an import must not add fixme=* to cover
> shortcomings of the data to be imported because they usually do not get
> fixed in a reasonable time. Therefore, I plan to revert these changes.
>
> Modest7 does not seem to realise that estimating tracktype from
> satellite imagery is not doing a service to OSM. I am currently
> preparing a revert of all additions of surface=* and tracktype=* by him
> he uploaded since 1 January 2020 [1]. The revert will only edit tags,
> geometry will stay unchanged. I revert changes on surface as well
> because that's not very different to tracktype except that it applies to
> other types of roads as well.
>
> The countries which will be affected are:
> Germany
> Denmark
> Turkey
> United States
> Poland
> Ukraine
> Morocco
> Czech Republic
> Lithuania
> Sweden
> Norway
> eSwatini
>
> A changeset discussion with him can be found at
> https://www.openstreetmap.org/changeset/87236896
>
> Best regards
>
> Michael
>
>
> [1] This date is not fixed yet.
>
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-- 
Florimond Berthoux
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