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

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1472#discussion_r104625839">app/assets/javascripts/index/tileinfo.js</a>:</p>
<pre style='color:#555'>> +  }
+
+  var page = {};
+
+  page.pushstate = page.popstate = function(path) {
+    OSM.loadSidebarContent(path, function () {
+      page.load(path, true);
+    });
+  };
+
+  page.load = function(path, noCentre) {
+    var params = querystring.parse(path.substring(path.indexOf('?') + 1)),
+        lat = parseFloat(params.lat),
+        lon = parseFloat(params.lon),
+        zoom = parseInt(params.zoom),
+        y = lat2y(lat, zoom),
</pre>
<p>Why not <code>map.project(latlng, zoom).floor()</code>? And <code>unproject</code> for the reverse transformation. It returns an <code>L.Point</code>, which you can use later for <code>getTileUrl</code>.</p>

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1472#discussion_r104626446">app/assets/javascripts/index/tileinfo.js</a>:</p>
<pre style='color:#555'>> +          if (matches)
+          {
+            var state = matches[1],
+                rendered = Date.parse(matches[2]),
+                accessed = Date.parse(matches[3]);
+
+            $("#tileinfo-state").text(I18n.t("javascripts.tileinfo.state." + state));
+            $("#tileinfo-rendered").text(I18n.l("time.formats.friendly", rendered));
+            $("#tileinfo-accessed").text(I18n.l("time.formats.friendly", accessed));
+          }
+        }
+      });
+    }
+    else
+    {
+      $("#tileinfo-status").hide();
</pre>
<p>I don't see this block unhidden anywhere. Do you need to add <code>$("#tileinfo-status").show()</code> somewhere above?</p>

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