diff --git a/js/tbl_gis_visualization.js b/js/tbl_gis_visualization.js
index cd7ed23358..17e5aeab00 100644
--- a/js/tbl_gis_visualization.js
+++ b/js/tbl_gis_visualization.js
@@ -26,6 +26,9 @@ var svg;
 function zoomAndPan()
 {
     var g = svg.getElementById('groupPanel');
+    if (!g) {
+        return;
+    }
 
     g.setAttribute('transform', 'translate(' + x + ', ' + y + ') scale(' + scale + ')');
     var id;