diff --git a/hosts/containers/sdrweb/adsb.html b/hosts/containers/sdrweb/adsb.html
new file mode 100644
index 00000000..eec5a214
--- /dev/null
+++ b/hosts/containers/sdrweb/adsb.html
@@ -0,0 +1,199 @@
+<!DOCTYPE html>
+
+<html>
+  <head>
+    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
+     <link rel="stylesheet" href="https://unpkg.com/leaflet@1.6.0/dist/leaflet.css" integrity="sha512-xwE/Az9zrjBIphAcBb3F6JVqxf46+CDLwfLMHloNu6KEQCAWi6HcDUbeOfBIptF7tcCzusKFjFw2yuvEpDL9wQ==" crossorigin=""/>
+    <style type="text/css">
+      html { height: 100% }
+      body { height: 100%; margin: 0; padding: 0 }
+      .plane-icon {
+        padding:0px;
+        margin:0px;
+      }
+      #map_canvas { height: 100% }
+      #info {
+        position: absolute;
+        width:20%;
+        height:100%;
+        bottom:0px;
+        right:0px;
+        top:0px;
+        background-color: white;
+        border-left:1px #666 solid;
+        font-family:Helvetica;
+      }
+      #info div {
+        padding:0px;
+        padding-left:10px;
+        margin:0px;
+      }
+      #info div h1 {
+        margin-top:10px;
+        font-size:16px;
+      }
+      #info div p {
+        font-size:14px;
+        color:#333;
+      }
+    </style>
+    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
+    <script src="https://unpkg.com/leaflet@1.6.0/dist/leaflet.js" integrity="sha512-gZwIG9x3wUXg2hdXF6+rVkLF/0Vi9U8D2Ntg4Ga5I5BZpVkVxlJWbSQtXPSiUTtC0TjtGOmxa1AJPuV0CPthew==" crossorigin=""></script>
+    <script type="text/javascript">
+    Map=null;
+    CenterLat=45.0;
+    CenterLon=9.0;
+    Planes={};
+    NumPlanes = 0;
+    Selected=null
+
+    function getIconForPlane(plane) {
+        var r = 255, g = 255, b = 0;
+        var maxalt = 40000; /* Max altitude in the average case */
+        var invalt = maxalt-plane.altitude;
+        var selected = (Selected == plane.hex);
+
+        if (invalt < 0) invalt = 0;
+        b = parseInt(255/maxalt*invalt);
+
+        /* As Icon we use the plane emoji, this is a simple solution but
+           is definitely a compromise: we expect the icon to be rotated
+           45 degrees facing north-east by default, this is true in most
+           systems but not all. */
+        var he = document.createElement("P");
+        he.innerHTML = '>';
+        var rotation = 45+360-plane.track;
+        var selhtml = '';
+
+        /* Give a border to the selected plane. */
+        if (Selected == plane.hex) {
+            selhtml = 'border:1px dotted #0000aa; border-radius:10px;';
+        } else {
+            selhtml = '';
+        }
+        he = '<div style="transform: rotate(-'+rotation+'deg); '+selhtml+'">✈️</div>';
+        var icon = L.divIcon({html: he, className: 'plane-icon'});
+        return icon;
+    }
+
+    function selectPlane(planehex) {
+        if (!Planes[planehex]) return;
+        var old = Selected;
+        Selected = planehex;
+        if (Planes[old]) {
+            /* Remove the highlight in the previously selected plane. */
+            Planes[old].marker.setIcon(getIconForPlane(Planes[old]));
+        }
+        Planes[Selected].marker.setIcon(getIconForPlane(Planes[Selected]));
+        refreshSelectedInfo();
+    }
+
+    /* Return a closure to caputure the 'hex' argument. This way we don't
+       have to care about how Leaflet passes the object to the callback. */
+    function selectPlaneCallback(hex) {
+        return function() {
+            return selectPlane(hex);
+        }
+    }
+    
+    function refreshGeneralInfo() {
+        var i = document.getElementById('geninfo');
+
+        i.innerHTML = NumPlanes+' planes on screen.';
+    }
+
+    function refreshSelectedInfo() {
+        var i = document.getElementById('selinfo');
+        var p = Planes[Selected];
+
+        if (!p) return;
+        var html = 'ICAO: '+p.hex+'<br>';
+        if (p.flight.length) {
+            html += '<b>'+p.flight+'</b><br>';
+        }
+        html += 'Altitude: '+p.altitude+' feet<br>';
+        html += 'Speed: '+p.speed+' knots<br>';
+        html += 'Coordinates: '+p.lat+', '+p.lon+'<br>';
+        i.innerHTML = html;
+    }
+
+    function fetchData() {
+        $.getJSON('/data.json', function(data) {
+            var stillhere = {}
+            for (var j=0; j < data.length; j++) {
+                var plane = data[j];
+                var marker = null;
+                stillhere[plane.hex] = true;
+                plane.flight = $.trim(plane.flight);
+
+                if (Planes[plane.hex]) {
+                    var myplane = Planes[plane.hex];
+                    marker = myplane.marker;
+                    marker.setLatLng([plane.lat,plane.lon]);
+                    marker.setIcon(getIconForPlane(plane));
+                    myplane.altitude = plane.altitude;
+                    myplane.speed = plane.speed;
+                    myplane.lat = plane.lat;
+                    myplane.lon = plane.lon;
+                    myplane.track = plane.track;
+                    myplane.flight = plane.flight;
+                    if (myplane.hex == Selected)
+                        refreshSelectedInfo();
+                } else {
+                    var icon = getIconForPlane(plane);
+                    var marker = L.marker([plane.lat, plane.lon], {icon: icon}).addTo(Map);
+                    var hex = plane.hex;
+                    marker.on('click',selectPlaneCallback(plane.hex));
+                    plane.marker = marker;
+                    marker.planehex = plane.hex;
+                    Planes[plane.hex] = plane;
+                }
+
+                // FIXME: Set the title
+                // if (plane.flight.length == 0)
+                //     marker.setTitle(plane.hex)
+                // else
+                //    marker.setTitle(plane.flight+' ('+plane.hex+')')
+            }
+            NumPlanes = data.length;
+
+            /* Remove idle planes. */
+            for (var p in Planes) {
+                if (!stillhere[p]) {
+                    Map.removeLayer(Planes[p].marker);
+                    delete Planes[p];
+                }
+            }
+        });
+    }
+
+    function initialize() {
+         Map = L.map('map_canvas').setView([51.08102, 13.72806], 8);
+
+	 L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
+	    attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
+	    maxZoom: 18,
+	    id: 'mapbox/streets-v11',
+	    accessToken: 'your.mapbox.access.token'
+	}).addTo(Map);
+
+        /* Setup our timer to poll from the server. */
+        window.setInterval(function() {
+            fetchData();
+            refreshGeneralInfo();
+        }, 100);
+    }
+
+    </script>
+  </head>
+  <body onload="initialize()">
+    <div id="map_canvas" style="width:80%; height:100%"></div>
+    <div id="info">
+      <div>
+        <h1>Dump1090</h1>
+        <p id="geninfo"></p>
+        <p id="selinfo">Click on a plane for info.</p>
+      </div>
+    </div>
+  </body>
+</html>
diff --git a/hosts/containers/sdrweb/default.nix b/hosts/containers/sdrweb/default.nix
index e0992e40..25c80e2d 100644
--- a/hosts/containers/sdrweb/default.nix
+++ b/hosts/containers/sdrweb/default.nix
@@ -33,12 +33,7 @@
       enableACME = true;
       root = pkgs.runCommandNoCC "adsb-map" {} ''
         mkdir $out
-        cp ${pkgs.fetchurl {
-          url = "https://github.com/antirez/dump1090/raw/master/gmap.html";
-          sha256 = "1llkk1b3n585x7539mszzx6wz91gb0glzafq3813r5wq8s5aywlz";
-        }} $out/index.html
-        substituteInPlace $out/index.html \
-          --replace "37.0, 13.0" "51.08102, 13.72806"
+        cp ${./adsb.html} $out/index.html
       '';
       extraConfig = ''
           index index.html;
