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

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/5736#discussion_r2037071848">app/assets/javascripts/osm.js.erb</a>:</p>
<pre style='color:#555'>> @@ -93,6 +100,11 @@ OSM = {
       mapParams.lon = params.get("mlon");
       mapParams.lat = params.get("mlat");
       mapParams.zoom = params.get("zoom") || 12;
+    } else if (geoURI.has("geo") && geoURI.has("u") && !geoURI.has("z")) {
+      mapParams.bounds = L.latLng(geoURI.get("geo").split(",")).toBounds(geoURI.get("u") * 4);
+    } else if (geoURI.has("geo")) {
+      [mapParams.lat, mapParams.lon] = geoURI.get("geo").split(",");
+      mapParams.zoom = geoURI.getAll("z").reduce((out, cur) => parseInt(cur, 10) || out, 12);
</pre>
<p dir="auto">I think you've added enough constraints that I have to switch to an overly explicit implementation. Have fun pinpointing the tests you don't like.</p>

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