[Talk-it] Fwd: [OSM-talk] Redacting 75, 000 street names contributed by user chdr

Edoardo Yossef Marascalchi e.marascalchi a gmail.com
Lun 28 Ago 2017 09:08:19 UTC


forse si potrebbe creare un task nel task manager per "curare" la malattia
prima di procedere con l'asportazione?
---------- Messaggio inoltrato ----------
Da: "Frederik Ramm" <frederik a remote.org>
Data: 27 ago 2017 3:50 PM
Oggetto: [OSM-talk] Redacting 75,000 street names contributed by user chdr
A: "Talk Openstreetmap" <talk a openstreetmap.org>, "talk-us a openstreetmap.org
Openstreetmap" <talk-us a openstreetmap.org>
Cc:

Hi,
>
>    in 2010 I was privately contacted by another OSM user with the
> suspicion that user "chdr" might be copying names from Google maps
> (there were few "easter eggs" in Oman that were only on Google and not
> in the real world, and they suddenly popped up on OSM). "chdr" was
> contacted at the time, but continued unfazed. In 2013 another mapper
> lodged a complaint with DWG about edits by chdr, and I emailed chdr
> asking him about his sources. At that point chdr stopped mapping. He
> never replied about his sources though, even when I set an ultimatum (of
> 31st August 2013) threatening to remove all names he contributed if he
> can't tell us his source. We do have to assume that all names
> contributed by chdr are copyright violations.
>
> (chdr has added names all around the world, making a harmless survey
> unlikely.)
>
> For various reasons I neglected to act on this, and was only reminded
> now, 5 years later, when DWG received a complaint from a user in Brazil
> where chdr has even used "source=google" occasionally. (But as I said,
> the suspicion is that Google was used throughout.)
>
> I have now compiled a list of all street names that were contributed by
> chdr and are still visible today; we're talking about almost 75,000
> street names world wide. The most affected countries are:
>
>   18023 "United States of America"
>   16345 "Mexico"
>   15109 "Brazil"
>    6791 "RSA"
>    2802 "Spain"
>    2614 "Australia"
>    1923 "Argentina"
>    1673 "Nigeria"
>    1569 "India"
>    1441 "Canada"
>     954 "Malaysia"
>     744 "Botswana"
>     717 "Philippines"
>     619 "Indonesia"
>     553 "Italy"
>     414 "Turkey"
>     290 "Hungary"
>     284 "Chile"
>     250 "Kenya"
>     127 "Saudi Arabia"
>     107 "Paraguay"
>     106 "Panama"
>     100 "Morocco"
>
> I've left out those countries with less than 100 affected ways.
>
> For the US, I can break it down by state:
>
>    5696 "Arizona"
>    5116 "Texas"
>    2294 "New York"
>    1164 "District of Columbia"
>     740 "Iowa"
>     494 "Colorado"
>     416 "New Jersey"
>     339 "Illinois"
>     268 "Michigan"
>     239 "Pennsylvania"
>     181 "Missouri"
>     147 "Georgia"
>     129 "New Mexico"
>     123 "North Carolina"
>     115 "California"
>     106 "Virginia"
>
> The breakdown for Mexico:
>
>    7749 "Baja California"
>    2084 "Puebla"
>    1964 "Chihuahua"
>    1539 "Coahuila"
>    1161 "Mexico"
>    1040 "Chiapas"
>     342 "Tamaulipas"
>     241 "Sonora"
>     185 "San Luis Potosi"
>     129 "New Mexico"
>
> and Brazil:
>
>   10904 "São Paulo"
>    2605 "Paraná"
>     945 "Rio de Janeiro"
>     270 "Rio Grande do Sul"
>     154 "Goiás"
>
> and South Africa:
>
>    4422 "Gauteng"
>     750 "KwaZulu-Natal"
>     600 "Eastern Cape"
>     439 "Western Cape"
>     400 "Northern Cape"
>     179 "Mpumalanga"
>
> - each time leaving out a couple others under 100.
>
> We believe that only names, not geometries have been taken from other
> maps so we'll remove and redact the names only. In identifying "names
> contributed by chdr" I took care to really only pick up the names that
> were introduced by them, not names that were there before, and also when
> chdr split a way that had a name I will make sure that the newly created
> way doesn't count as "named by chdr". Additionally, I have ignored those
> cases where chdr simply performed a TIGER expansion (St->Street etc) of
> a name that was there before.
>
> My process has two weak points (that I am aware of):
>
> 1. It doesn't properly "follow" a chrdr-contributed name through way
> splits performed by other users; if someone has split a way created by
> chdr, then the name will remain on the bit that was created by this
> user. This is somewhat unsatisfying but after having manually checked a
> random sample I think the problem is small enough to be ignored.
>
> 2. It is possible that, like with a recent case in Switzerland where I
> had to do a similar redaction, some of these chdr-contributed names will
> have been confirmed by others in a survey, i.e. someone else surveyed
> the area and checked the name, but saw no need to change it in any way
> since it was already correct. Sadly my process will now remove the name
> even though, had the name not been there in the first place, that person
> could have added the name. This is not nice but I don't see how it could
> be avoided.
>
> Here's a list of way IDs affected, with country and state:
>
> http://www.remote.org/frederik/tmp/chdr.details
>
> I am trying to keep the damage to OSM to a minimum while at the same
> time respecting copyright. If anyone wants to spot check a few names in
> their area and can suggest a refinement of the process that would leave
> more names in place because there's reason to assume they are legit, I'm
> all ears.
>
> It has been suggested to me that even if names in the US were taken
> from Google, Google would in turn have had them from TIGER and hence we
> could simply leave them be. I am not convinced of this reasoning but
> willing to hear that case argued.
>
> It is sad that chdr isn't available for comment but I must take their
> silence as an admission of wrongdoing. I will fire off another message
> to them pointing to this thread.
>
> Bye
> Frederik
>
> --
> Frederik Ramm  ##  eMail frederik a remote.org  ##  N49°00'09" E008°23'33"
>
>
> _______________________________________________
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> https://lists.openstreetmap.org/listinfo/talk
>
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