<p>When going to the iD editor you can supply a gpx url parameter that loads a custom pink-colored trace into the editor. The HOT tasking manager and mappingnorthkorea.com use this.</p>
<p>I'd like to see this as a feature for the regular map as well. (or another way to supply a trace)</p>
<p>Example:<br>
<a href="https://www.openstreetmap.org/edit?editor=id&#map=13/40.43086/124.85977**&gpx=https://mappingnorthkorea.com/api/sector/generate/5c93aebb02ed1b2be46dbcfe.gpx" rel="nofollow">https://www.openstreetmap.org/edit?editor=id&#map=13/40.43086/124.85977**&gpx=https://mappingnorthkorea.com/api/sector/generate/5c93aebb02ed1b2be46dbcfe.gpx</a>**</p>
<p><a target="_blank" rel="noopener noreferrer" href="https://user-images.githubusercontent.com/6686385/59981548-40f03e00-9605-11e9-93de-9fbe7d6f2948.png"><img src="https://user-images.githubusercontent.com/6686385/59981548-40f03e00-9605-11e9-93de-9fbe7d6f2948.png" alt="image" style="max-width:100%;"></a></p>

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