diff --git a/frontend-js/src/main/js/map/data/Alias.js b/frontend-js/src/main/js/map/data/Alias.js
index 06ef52e07e86eca5edf278bcc6a67dcb46f446c5..11bdd5649c9b31d2f615836ccad54df464c5f9c4 100644
--- a/frontend-js/src/main/js/map/data/Alias.js
+++ b/frontend-js/src/main/js/map/data/Alias.js
@@ -152,6 +152,13 @@ Alias.prototype.setWidth = function(width) {
 Alias.prototype.setHeight = function(height) {
   this.height = height;
 };
+Alias.prototype.getWidth = function() {
+  return this.width;
+};
+
+Alias.prototype.getHeight = function() {
+  return this.height;
+};
 
 Alias.prototype.getName = function() {
   return this.name;