diff --git a/app/src/main/java/com/example/cosmosclient/entities/AreaInformation.java b/app/src/main/java/com/example/cosmosclient/entities/AreaInformation.java
index 4a581ac..112590a 100644
--- a/app/src/main/java/com/example/cosmosclient/entities/AreaInformation.java
+++ b/app/src/main/java/com/example/cosmosclient/entities/AreaInformation.java
@@ -9,6 +9,7 @@
     private HashMap<Integer, ArrayList<Feature>> feature = new HashMap<>();
     private Time lastUpdated;
 
+    //location
     public void setLocation(Location location){
         this.location = location;
     }
@@ -16,13 +17,28 @@
         return this.location;
     }
 
+    //feature
     public void setFeature(HashMap<Integer, ArrayList<Feature>> feature) {
         this.feature = feature;
     }
+    public void putFeature(int index,ArrayList<Feature> fea){
+        feature.put(index,fea);
+    }
     public HashMap<Integer, ArrayList<Feature>> getFeature() {
         return feature;
     }
+    public int getFeatureCount(){
+        return feature.size();
+    }
+    public void clearFeature(){
+        feature.clear();
+    }
+    public void removeFeature(int index){
+        feature.remove(index);
+    }
 
+
+    //lastUpdated
     public void setLastUpdated(Time lastUpdated) {
         this.lastUpdated = lastUpdated;
     }