<p></p>
<p><b>@HolgerJeromin</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/4371#discussion_r1405690514">config/key.yml</a>:</p>
<pre style='color:#555'>> @@ -70,3 +70,10 @@ cyclemap:
   - { min_zoom: 14, max_zoom: 19, name: bicycle_shop, image: bicycle_shop.png }
   - { min_zoom: 14, max_zoom: 19, name: bicycle_parking, image: bicycle_parking.png }
   - { min_zoom: 16, max_zoom: 19, name: toilets, image: toilets.png }
+opnvkarte:
+  - { min_zoom: 6, name: rail, source: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADQAAAAECAIAAABOYIsRAAAAF0lEQVQoz2Nsa2tjGKyAiWEQg1HHkQsA43UBmpvJuFsAAAAASUVORK5CYII=" }
</pre>
<p dir="auto">Perhaps we could use svgs here for easier changeing?</p>
<p dir="auto"><code class="notranslate">"data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg"><rect width="300" height="100" style="fill:rgb(0,0,255)" /></svg>"</code></p>

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