<div dir="ltr"><div><div>Hi,<br><br></div>for Europe, you could also use the EU-DEM (<a href="http://www.eea.europa.eu/data-and-maps/data/eu-dem">http://www.eea.europa.eu/data-and-maps/data/eu-dem</a>) "a hybrid product based on SRTM and ASTER GDEM data fused by a weighted averaging approach" => full compatibility with SRTM, but with better data ;)<br>
<br></div>Sylvain<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-08-28 20:49 GMT+02:00 Peter Barth <span dir="ltr"><<a href="mailto:osm-peda@won2.de" target="_blank">osm-peda@won2.de</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<br>
<br>
I created a new challenge for MapRoulette: "Fix waterway direction".<br>
<br>
As the waterway's direction in OSM denotes the direction of the water's<br>
flow, I started to compare them to SRTM. This leads to more than 1<br>
million wrong directions for Europe only. Many times SRTM is right,<br>
however, due to data errors, not every time. That's why I created this<br>
challenge.<br>
<br>
A more detailed description can also be found on my user diary here:<br>
<a href="http://www.openstreetmap.org/user/Peda/diary/23632" target="_blank">http://www.openstreetmap.org/user/Peda/diary/23632</a><br>
<br>
I started with the really easy ones and only Europe for now. I will<br>
upload further tasks soon, worldwide coverage will follow, too.<br>
<br>
Hope you enjoy this challenge,<br>
Peda<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
<br>
_______________________________________________<br>
talk mailing list<br>
<a href="mailto:talk@openstreetmap.org">talk@openstreetmap.org</a><br>
<a href="https://lists.openstreetmap.org/listinfo/talk" target="_blank">https://lists.openstreetmap.org/listinfo/talk</a><br>
</font></span></blockquote></div><br></div>