property conforms to JSON

src/engine/objects/Zone.java

@@ -56,7 +56,7 @@ public class Zone extends AbstractGameObject {
     public boolean isNPCCity = false;
     public boolean guild_zone;
     public String hash;
-    public float worldAltitude = 0;
+    public float global_height = 0;
     public float seaLevel = 0f;
     public float sea_level_offset = 0;
     public static final Set<Mob> respawnQue = Collections.newSetFromMap(new ConcurrentHashMap<>());
@@ -230,7 +230,7 @@ public class Zone extends AbstractGameObject {
         }
 
         this.setBounds();
-        this.worldAltitude = ZoneManager.caclulateWorldAltitude(this);
+        this.global_height = ZoneManager.calculateGlobalZoneHeight(this);
         setSeaLevel();
     }
 
@@ -251,7 +251,7 @@ public class Zone extends AbstractGameObject {
                 this.sea_level = this.parent.sea_level + this.sea_level_offset;
                 break;
             case "SELF":
-                this.sea_level = this.worldAltitude + this.sea_level_offset;
+                this.sea_level = this.global_height + this.sea_level_offset;
                 break;
         }
     }