[MapRoulette] Introducing "Fix waterway direction"

Peter Barth osm-peda at won2.de
Thu Aug 28 18:49:55 UTC 2014

Hi all,

I created a new challenge for MapRoulette: "Fix waterway direction".

As the waterway's direction in OSM denotes the direction of the water's
flow, I started to compare them to SRTM. This leads to more than 1 
million wrong directions for Europe only. Many times SRTM is right,
however, due to data errors, not every time. That's why I created this 

A more detailed description can also be found on my user diary here:

I started with the really easy ones and only Europe for now. I will 
upload further tasks soon, worldwide coverage will follow, too.

Hope you enjoy this challenge,


More information about the MapRoulette mailing list