OpenStreetMap
Take a look at the edits of user chdr. He’s adding street names in many different countries on 4 or 5 continents. Seems highly unlikely that he surveyed it himself.
He never uses source tags or changeset comments and he didn’t respond to my PM on the subject. So where does he get his data from ?
Discussion
Comment from Takuto on 29 July 2013 at 11:07
He’s International Mystery Man, travelling CIA agent. Or something. Seriously, you should take this question to correspondig OSM forum thread, cause its better place for such discussions - more concerned mappers there.
Comment from mcld on 30 July 2013 at 18:49
Curious. I wonder if it’s possible to spot any tell-tale “deliberate errors” that chdr might be importing from known sources.
Comment from pieleric on 31 July 2013 at 21:52
Please report this to the Data Working Group. The easiest is to send them an email: data@osmfoundation.org
It indeed looks pretty suspicious. The fact that locations are spread all over the world is one thing (but there is Bing), adding names of streets is much more suspicious. Also, he has no GPS traces, and no changeset description.
That said, it might be actual survey data from someone who happen to travel a lot, so better be cautious. My own changes could look almost as suspicious if I didn’t fill in the changeset description with the data source and upload GPS traces from time to time :-) It can be a hint to compare his changes to Bing imagery and see if they match (alignment + stop on the border of the imagery). Also, he might not speak English, and therefore just have no idea what your messages are about.