--- a/client/src/components/layers/Layers.vue	Mon May 06 18:18:17 2019 +0200
+++ b/client/src/components/layers/Layers.vue	Tue May 07 12:18:07 2019 +0200
@@ -10,7 +10,9 @@
         icon="layer-group"
         :title="label"
         :closeCallback="close"
-        :actions="[{ callback: refreshLayers, icon: 'sync' }]"
+        :actions="[
+          { callback: refreshLayers, icon: mapsLoading ? 'spinner' : 'sync' }
+        ]"
       />
       <div class="small" v-if="openLayersMaps.length">
         <Layerselect layerId="OPENSTREETMAP" />
@@ -59,7 +61,7 @@
   },
   computed: {
     ...mapState("application", ["showLayers"]),
-    ...mapState("map", ["openLayersMaps"]),
+    ...mapState("map", ["openLayersMaps", "mapsLoading"]),
     label() {
       return this.$gettext("Layers");
     }
@@ -70,6 +72,7 @@
     },
     refreshLayers() {
       this.openLayersMaps.forEach(map => {
+        this.$store.commit("map/increaseMapsLoading");
         let layers = map.getLayers().getArray();
         for (let i = 0; i < layers.length; i++) {
           let layer = layers[i];