diff --git a/odm_preprocess.py b/odm_preprocess.py
index 96bc64a..b3015c0 100644
--- a/odm_preprocess.py
+++ b/odm_preprocess.py
@@ -192,7 +192,7 @@ class ImagePreprocessor:
         previous_points = self.gps_points.copy()
 
         # 按时间戳排序
-        self.gps_points = self.gps_points.sort_values('timestamp')
+        self.gps_points = self.gps_points.sort_values('date')
 
         # 保留索引为偶数的行（即隔一个保留一个）
         self.gps_points = self.gps_points.iloc[::2].reset_index(drop=True)