Update app.py

app.py

@@ -83,6 +83,12 @@ if st.button('顯示每個區的商家數量比例圓餅圖'):
 # 顯示地圖按鈕
 if st.button('顯示餐廳地圖'):
     st.subheader("餐廳地圖")
-    # Drop rows with missing coordinates
+    
+    # Drop rows with missing or out-of-bounds coordinates
     df_map = df.dropna(subset=['Latitude', 'Longitude'])
+    df_map = df_map[
+        (df_map['Latitude'] >= 20.5) & (df_map['Latitude'] <= 25.5) &
+        (df_map['Longitude'] >= 119.3) & (df_map['Longitude'] <= 124.5)
+    ]
+    
     st.map(df_map[['Latitude', 'Longitude']])