diff --git a/projects/common-map/src/fm-map/components/aol/item-vector-source/item-vector-source.component.ts b/projects/common-map/src/fm-map/components/aol/item-vector-source/item-vector-source.component.ts
index fdec33c..85accfa 100644
--- a/projects/common-map/src/fm-map/components/aol/item-vector-source/item-vector-source.component.ts
+++ b/projects/common-map/src/fm-map/components/aol/item-vector-source/item-vector-source.component.ts
@@ -215,6 +215,8 @@ export class ItemVectorSourceComponent extends SourceVectorComponent implements
   }
   
   getDisplayTextForFeature(feature: Feature<Geometry>, propertiesToShow: string[], overrule: style.Text = null, zoom: { min: number, current: number } = null): style.Text {
+    if (!feature) return null;
+    if (feature.get('itemType') !== 'vnd.farmmaps.itemtype.cropfield') return null;
     if (!propertiesToShow) return null;
     if (propertiesToShow.length <= 0) return null;
     if (zoom && zoom.current > zoom.min) return null;
@@ -226,7 +228,9 @@ export class ItemVectorSourceComponent extends SourceVectorComponent implements
         case "area": value = formatNumber(value, this.locale, '0.1-2') + 'ha'; break;
         case "centroid": value = feature.getGeometry() ? getCenter(feature.getGeometry().getExtent()) : null; break;
       }
-      displayText += value + (i < propertiesToShow.length ? '\n': '');
+      if (value) {
+        displayText += value + (i < propertiesToShow.length ? '\n' : '');
+      }
     }
     
     const styleText = new style.Text({