2025-10-20 09:55:39,791 - satellite_download_logger - INFO - Successfully downloaded image ID LANDSAT/LC08/C02/T1_TOA/LC08_074089_20250926 as 2025-09-26-22-13-38_L8_nzd0392_ms.tif
2025-10-20 09:55:46,693 - satellite_download_logger - INFO - Successfully downloaded image ID LANDSAT/LC08/C02/T1_TOA/LC08_074090_20250926 as 2025-09-26-22-14-02_L8_nzd0392_ms.tif
2025-10-20 09:55:53,673 - satellite_download_logger - ERROR - Could not save metadata for LANDSAT/LC09/C02/T1_TOA/LC09_074089_20251004 that failed.
Failed to open the image file data/nzd0392/L9/ms/2025-10-04-22-13-41_L9_nzd0392_ms.tif
2025-10-20 09:55:59,429 - satellite_download_logger - INFO - Successfully downloaded image ID LANDSAT/LC09/C02/T1_TOA/LC09_074090_20251004 as 2025-10-04-22-14-05_L9_nzd0392_ms.tif
2025-10-20 09:56:06,436 - satellite_download_logger - INFO - Successfully downloaded image ID LANDSAT/LC09/C02/T1_TOA/LC09_075089_20251011 as 2025-10-11-22-19-57_L9_nzd0392_ms.tif
2025-10-20 09:56:12,588 - satellite_download_logger - ERROR - Could not save metadata for LANDSAT/LC09/C02/T1_TOA/LC09_075090_20250925 that failed.
Failed to open the image file data/nzd0392/L9/ms/2025-09-25-22-20-16_L9_nzd0392_ms.tif
2025-10-20 09:56:17,910 - satellite_download_logger - INFO - Successfully downloaded image ID LANDSAT/LC09/C02/T1_TOA/LC09_075090_20251011 as 2025-10-11-22-20-21_L9_nzd0392_ms.tif
2025-10-20 09:56:17,951 - satellite_download_logger - INFO - Please read the following information carefully:

2025-10-20 09:56:17,951 - satellite_download_logger - INFO - find_wl_contours2: A method for extracting shorelines that uses the sand water interface detected with the model to refine the threshold that's used to detect shorelines .
  - This is the default method used when there are enough sand pixels within the reference shoreline buffer.

2025-10-20 09:56:17,951 - satellite_download_logger - INFO - find_wl_contours1: This shoreline extraction method uses a threshold to differentiate between water and land pixels in images, relying on Modified Normalized Difference Water Index (MNDWI) values. However, it may inaccurately classify snow and ice as water, posing a limitation in certain environments.
  - This is only used when not enough sand pixels are detected within the reference shoreline buffer.

2025-10-20 09:56:17,951 - satellite_download_logger - INFO - ---------------------------------------------------------------------------------------------------------------------
2025-10-20 09:56:17,953 - satellite_download_logger - INFO - Extracting shorelines for L5 Minimum Shoreline Length: 500


2025-10-20 09:56:17,954 - satellite_download_logger - INFO - WARNING: CoastSat has hard-coded the value for the minimum shoreline length for L7 to 200


2025-10-20 09:56:17,955 - satellite_download_logger - INFO - Extracting shorelines for L7 Minimum Shoreline Length: 200


2025-10-20 09:56:17,956 - satellite_download_logger - INFO - Extracting shorelines for L8 Minimum Shoreline Length: 500


2025-10-20 09:56:17,969 - satellite_download_logger - WARNING - L8 2025-09-26-22-13-38: Skipped due to cloud cover 83.35% > threshold 10.00%
2025-10-20 09:56:17,981 - satellite_download_logger - WARNING - L8 2025-09-26-22-14-02: Skipped due to cloud cover 88.79% > threshold 10.00%
2025-10-20 09:56:17,982 - satellite_download_logger - INFO - Extracting shorelines for L9 Minimum Shoreline Length: 500


2025-10-20 09:56:17,993 - satellite_download_logger - WARNING - L9 2025-10-04-22-14-05: Skipped due to cloud cover 91.81% > threshold 10.00%
2025-10-20 09:56:18,007 - satellite_download_logger - WARNING - L9 2025-10-11-22-19-57: Skipped due to cloud cover 63.29% > threshold 10.00%
2025-10-20 09:56:18,010 - satellite_download_logger - INFO - L9 2025-10-11-22-20-21 cloud cover : 0.00%
2025-10-20 09:56:18,022 - satellite_download_logger - INFO - L9 2025-10-11-22-20-21: sand: 0.00% ,whitewater: 0.00% ,water: 21.92%
2025-10-20 09:56:18,022 - satellite_download_logger - INFO - L9 2025-10-11-22-20-21: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1
2025-10-20 09:56:18,023 - satellite_download_logger - ERROR - L9 2025-10-11-22-20-21: Could not map shoreline due to error no valid pixels found in reference shoreline buffer.
Traceback (most recent call last):
  File "/home/ubuntu/.local/lib/python3.12/site-packages/coastsat/SDS_shoreline.py", line 1061, in extract_shorelines
    shoreline, t_mndwi = find_shoreline_optical(
                         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/.local/lib/python3.12/site-packages/coastsat/SDS_shoreline.py", line 216, in find_shoreline_optical
    contours_mwi, t_mndwi = find_wl_contours1(im_mndwi, cloud_mask, im_ref_buffer)
                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ubuntu/.local/lib/python3.12/site-packages/coastsat/SDS_shoreline.py", line 1426, in find_wl_contours1
    raise ValueError("no valid pixels found in reference shoreline buffer.")
ValueError: no valid pixels found in reference shoreline buffer.