diff --git a/public/templates/data.tmpl b/public/templates/data.tmpl
index 9ecdc37..d396dfc 100644
--- a/public/templates/data.tmpl
+++ b/public/templates/data.tmpl
@@ -77,9 +77,6 @@
     };
     {{/is_terrain}}
     {{#is_terrain}}
-
-    let baseUrl = window.location.origin;
-
     var style = {
       version: 8,
       sources: {
@@ -95,7 +92,7 @@
         },
         "contour": {
           "type": "vector",
-          "tiles": [ baseUrl + "/data/{{id}}/contour/{z}/{x}/{y}" ],
+          "tiles": "{{public_url}}data/{{id}}/contour/{z}/{x}/{y}" ],
         }
       },
       "glyphs": "/fonts/{fontstack}/{range}.pbf",