It might be Bing that's outdated, or Strava being outdated there. I found this article which might be related: http://allafrica.com/stories/200508190509.html
So it's a dam (to the SW of the bigger lake), created after mining stuff, but the dam collapsed due to rainfall in 2005, and presumably, they're building it up again. So the lakes you see might be dry now, or might have been dry in the past. I don't think there has ever been a bridge. When you're building a dam, I guess it's quite normal to flood some areas while trying to keep others dry where you're building. About Strava, it's a sports app, so the best and most recent information is available in regions where sports is exercised (typically the richer areas). However, the app is so popular that it has more GPS info than any other source we have available, and GPS info tends to always be correlated with wealth anyway. Regards, Sander 2014-12-27 0:47 GMT+01:00 Blake Girardot <[email protected]>: > > > Quick follow up sorry. > > The link to the location of the image is in the wiki image data, but here > it is directly: > > https://www.openstreetmap.org/#map=14/7.6968/-12.3178 > > As to the "road" right through the water, maybe they built a bridge just > occurred to me. > > cheers, > blake > > > > > On 12/27/2014 12:37 AM, Blake Girardot wrote: > >> Hi Everyone, >> >> Sanderd17 mentioned in irc that there is a very large data set of gps >> traces now available for all of OSM to use to help us in our mapping. >> >> I hadn't heard of it, but that doesn't mean anything, I never hear of >> anything :) >> >> But on the off chance you are like me and had not heard of it yet, here >> is the info: >> >> http://wiki.openstreetmap.org/wiki/Strava >> >> I added an image to that page using the strava data in W. Africa and it >> came out very interesting to me. >> >> 1. It seems to confirm pretty good image alignment for existing map data. >> >> 2. It seems to show roads/paths that we cannot see in the Bing 2012 >> imagery. I almost think we could map from this data, but I stress >> almost. But if I was trying to follow a road that the imagery only >> partially showed, and this data was available, I would consult it for >> sure. >> >> 3. Some of those roads we can't see in the imagery go right through >> bodies of water(!?) I do not know if that is a data error or a seasonal >> issue. >> >> Anyway, just another much appreciated tool for us to use. Thank you >> again sanderd17. >> >> Cheers, >> Blake >> >> > _______________________________________________ > HOT mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/hot >
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