Update app.py

app.py

@@ -306,6 +306,11 @@ def get_traffic_gdf(lat_min, lat_max, lon_min, lon_max, local_time_zone, _loc, f
         return None
 
     try:
+        # Define columns for the DataFrame
+        columns = ["icao24","callsign","origin_country","time_position","last_contact","longitude","latitude",
+                "baro_altitude","on_ground","velocity","true_track","vertical_rate","sensors","geo_altitude",
+                "squawk","spi","position_source"]
+        
         unix_timestamp = int(json_dict["time"])
         local_timezone = pytz.timezone(local_time_zone)
         local_time = datetime.fromtimestamp(unix_timestamp, local_timezone).strftime('%Y-%m-%d %H:%M:%S')