修复Step7采样点布设路径读取问题：GDAL环境变量保护+路径归一化+FileNotFoundError检查+水域掩膜备选路径扫描

src/utils/sampling.py

@@ -1,10 +1,21 @@
-from src.utils.util import *
-import math
+# -*- coding: utf-8 -*-
+"""
+采样点生成模块 - 提供分块采样和光谱数据提取功能
+"""
+
 import os
+import math
+
+# GDAL 环境变量保护（放在最前面，防止路径/编码问题）
+os.environ['GDAL_FILENAME_IS_UTF8'] = 'YES'
+os.environ['SHAPE_ENCODING'] = 'UTF-8'
+
 import numpy as np
 from osgeo import gdal, ogr
 import spectral
 from scipy import ndimage
+from src.utils.util import write_bands
+
 try:
     from skimage import morphology
     from skimage.morphology import skeletonize, medial_axis
@@ -87,6 +98,12 @@ def get_spectral_sampling_points_chunked(bil_file, water_mask_shp, severe_glint=
     ogr.UseExceptions()
 
     try:
+        # ---------- 路径归一化 + 存在性检查 ----------
+        bil_file = os.path.abspath(bil_file).replace('\\', '/')
+        print(f"[路径检查] 去耀斑影像: {bil_file}")
+        if not os.path.exists(bil_file):
+            raise FileNotFoundError(f"【后端错误】无法在磁盘上找到指定的去耀斑影像: {bil_file}")
+
         # 打开bil文件
         dataset_bil = gdal.Open(bil_file)
         if dataset_bil is None: