diff --git a/_includes/overview.html b/_includes/overview.html
index bdce1056870d1c53c4e0ecf2a969d831982c5246..e5c49dbe22f717c801133342e6d6a95e9e488c9d 100644
--- a/_includes/overview.html
+++ b/_includes/overview.html
@@ -69,6 +69,6 @@
 </div>
 <script>
 $( document ).ready(function() {
-    get_distances();
+    get_distances_tags();
 });
 </script>
diff --git a/assets/js/script.js b/assets/js/script.js
index 90d1d532ef325755ac9681eaaf5ad9a29d4a774c..c7811e0363fdce1b22ec63df94f05f88ce9238ce 100644
--- a/assets/js/script.js
+++ b/assets/js/script.js
@@ -34,13 +34,40 @@ function get_by_tag(tags){
   );
 
   $(tag_class).toggleClass('d-none',false);
+
+  var p=['tag','subtag','lat','long'];
+  var tag=tags[0];
+  var subtag=tags[1];
+  var lat=undefined;
+  var long=undefined;
+
+  var param=[];
+
+  p.forEach(
+    function(v){
+      if( eval(v) != undefined ){
+        var pp=eval(v);
+      } else {
+        var pp=getQueryVariable(v);
+      }
+      if( pp != undefined ) param.push(v + '='+pp);
+    }
+  );
+
+  ChangeUrl( '',  (( param != '' ) ? '?' : '' )+param.join('&') );
 }
 
-function get_distances(){
+function get_distances_tags(){
+
   var url_string = window.location.href;
   var url = new URL(url_string);
   var lat = url.searchParams.get('lat');
   var long = url.searchParams.get('long');
+
+  var tag = url.searchParams.get('tag');
+  var subtag = url.searchParams.get('subtag');
+  get_by_tag([ tag, subtag ]);
+
   if( lat == null || long == null ){
     lat=-100;
   }
@@ -58,7 +85,6 @@ function get_distances(){
   } );
 }
 
-
 function formInput(obj){
   if( $(obj).hasClass('form-decimals') ){
     $(obj).toggleClass('is-invalid', ! $.isNumeric( $(obj).val() ) );
@@ -115,3 +141,23 @@ function importYml(){
     }
   );
 }
+
+function getQueryVariable(variable)
+{
+       var query = window.location.search.substring(1);
+       var vars = query.split("&");
+       for (var i=0;i<vars.length;i++) {
+               var pair = vars[i].split("=");
+               if(pair[0] == variable){return pair[1];}
+       }
+}
+
+function ChangeUrl(page, query ) {
+    console.log( query );
+    if (typeof (history.replaceState) != "undefined") {
+        var obj = { Page: page, Url: query };
+        history.replaceState(obj, obj.Page, obj.Url);
+    } else {
+        alert("Browser does not support HTML5.");
+    }
+}