OpenStreetMap

What's going in Egypt?

Posted by Chetan_Gowda on 29 July 2016 in English (English)

From last week I'm noticing lot data coming to OpenStreetMap using DigitalGlobe imagery. Some users are adding residential roads and overlapping the primary roads.

screen shot 2016-07-29 at 6 52 32 pm

Augmented changeset viewer: https://overpass-api.de/achavi/?changeset=40938983

Throwing here a small post to let know the community.

Comment from SimonPoole on 29 July 2016 at 19:03

It is not unlikely that that is Facebook see http://forum.openstreetmap.org/viewtopic.php?id=55220 if data is breaking it would be important to give both facebook and the DWG (data@somfoundation.org) a heads up.

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Comment from SimonPoole on 29 July 2016 at 19:57

PS: naturally it could simply be that there is new imagery available, but the user in question would seem to be a very very prolific mapper in that case.

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Comment from Hjart on 31 July 2016 at 16:16

I had just had a look at it: Lots of tiny road segments and imho generally not very impressive quality. My guess is that it wasn't done by a human. It's probably good for looks (at a distance), but it's going to take a lot of work (by humans) to clean it up. I think I found one of the areas mentioned in the FB forum post mentioned above: http://www.openstreetmap.org/#map=14/30.4928/32.3063&layers=N (also in Egypt) which appears very similar to this.

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Comment from Hjart on 31 July 2016 at 17:02

There's a lot of crap in that area. Whoever was supposed to clean it up before upload certainly didn't.

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Comment from SomeoneElse on 1 August 2016 at 16:26

At least one of the accounts that caused the issues in Thailand that were discussed in http://forum.openstreetmap.org/viewtopic.php?id=54635 and http://forum.openstreetmap.org/viewtopic.php?id=54648 also edited in Egypt (a different account to this one I believe). In the second of those threads someone from Facebook explains a bit about what they're doing.

My comment at http://forum.openstreetmap.org/viewtopic.php?pid=593266#p593266 explains where I'd go from here - if you see a potentially problematic changeset, ask the user about it directly, don't just write a diary entry that they're unlikely to read :)

I notice that a couple of people have commented on https://www.openstreetmap.org/changeset/41096427 including Ethan from the DWG, so we're aware of at least part of the problem, but if there are issues with other changesets it's always good to comment on them and point out specific problems with each one. That way the users concerned can understand the full range of the issues that they're causing, and people looking at changeset discussion comments via http://resultmaps.neis-one.org/osm-discussions can see the issues that are being raised.

I wouldn't make any assumptions about who's working for whom yet or on what basis, though I guess that there's no harm in asking...

  • Andy (like Ethan, a DWG member)
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