diff --git a/projects/common-map/src/fm-map/components/aol/item-layers/item-layers.component.ts b/projects/common-map/src/fm-map/components/aol/item-layers/item-layers.component.ts
index c443775..9ac3bd0 100644
--- a/projects/common-map/src/fm-map/components/aol/item-layers/item-layers.component.ts
+++ b/projects/common-map/src/fm-map/components/aol/item-layers/item-layers.component.ts
@@ -48,9 +48,11 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
      return "#" + this.componentToHex(r) + this.componentToHex(g) + this.componentToHex(b) + this.componentToHex(a);
   }
 
-  getColorFromGradient(layer: ILayer,  feature): style.Style {
+  getColorFromGradient(item:IItem,layer: ILayer,  feature): style.Style {
     var value = feature.get(layer.name);
-    var gradient: IGradientstop[] = layer.renderer.colorMap.gradient;
+    var key = item.code + "_" + value;
+    if(!this.styleCache[key]) {
+      var gradient: IGradientstop[] = layer.renderer.colorMap.gradient;
     var histogram: IHistogram = layer.renderer.band.histogram;
     var index = (value - histogram.min) / histogram.max;
     var min = gradient[0];
@@ -67,7 +69,7 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
     var green = Math.round(min.color.green + ((max.color.green - min.color.green) * i / size));
     var blue = Math.round(min.color.blue + ((max.color.blue - min.color.blue) * i / size));
 
-    return new style.Style(
+    this.styleCache[key] = new style.Style(
       {
         image: new style.Circle({
           fill: new style.Fill({
@@ -83,6 +85,8 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
           width: 1.25
         }),
       });
+    }
+    return this.styleCache[key];
   }
 
   createGeotiffLayer(item:IItem,itemLayer:IItemLayer):Layer {
@@ -128,7 +132,7 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
           url: `${this._apiEndPoint}/api/v1/items/${item.code}/vectortiles/{z}/{x}/{y}.pbf?v=${Date.parse(item.updated)}`
         }),
         style: (feature) => {
-          return this.getColorFromGradient(l, feature);
+          return this.getColorFromGradient(item,l, feature);
         }
       })
     } else if (l && l.rendering && l.rendering.renderoutputType == "Tiles") {
@@ -161,7 +165,7 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
       layer = new VectorLayer({
         source: source,
         style: (feature) => {
-          var key = feature.get("color");
+          var key =feature.get("code") + "_" + feature.get("color");
           if (!this.styleCache[key]) {
             var color = feature.get("color");
             this.styleCache[key] = new style.Style(