2026-01-01 00:05:20,136 - satellite_download_logger - ERROR - Could not save metadata for LANDSAT/LC08/C02/T1_TOA/LC08_072088_20251201 that failed. Failed to open the image file data/nzd0347/L8/ms/2025-12-01-22-00-54_L8_nzd0347_ms.tif 2026-01-01 00:05:24,398 - satellite_download_logger - INFO - Successfully downloaded image ID LANDSAT/LC08/C02/T1_TOA/LC08_072088_20251217 as 2025-12-17-22-00-54_L8_nzd0347_ms.tif 2026-01-01 00:05:33,324 - satellite_download_logger - ERROR - Could not save metadata for LANDSAT/LC08/C02/T1_TOA/LC08_072089_20251201 that failed. Failed to open the image file data/nzd0347/L8/ms/2025-12-01-22-01-18_L8_nzd0347_ms.tif 2026-01-01 00:05:40,000 - satellite_download_logger - INFO - Successfully downloaded image ID LANDSAT/LC08/C02/T1_TOA/LC08_072089_20251217 as 2025-12-17-22-01-18_L8_nzd0347_ms.tif 2026-01-01 00:05:44,723 - satellite_download_logger - ERROR - Could not save metadata for LANDSAT/LC09/C02/T1_TOA/LC09_072088_20251123 that failed. Failed to open the image file data/nzd0347/L9/ms/2025-11-23-22-00-59_L9_nzd0347_ms.tif 2026-01-01 00:05:49,188 - satellite_download_logger - ERROR - Could not save metadata for LANDSAT/LC09/C02/T1_TOA/LC09_072088_20251225 that failed. Failed to open the image file data/nzd0347/L9/ms/2025-12-25-22-01-04_L9_nzd0347_ms.tif 2026-01-01 00:05:54,509 - satellite_download_logger - INFO - Successfully downloaded image ID LANDSAT/LC09/C02/T1_TOA/LC09_072089_20251209 as 2025-12-09-22-01-21_L9_nzd0347_ms.tif 2026-01-01 00:06:01,685 - satellite_download_logger - ERROR - Could not save metadata for LANDSAT/LC09/C02/T1_TOA/LC09_072089_20251225 that failed. Failed to open the image file data/nzd0347/L9/ms/2025-12-25-22-01-28_L9_nzd0347_ms.tif 2026-01-01 00:06:01,708 - satellite_download_logger - INFO - Please read the following information carefully: 2026-01-01 00:06:01,708 - 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. 2026-01-01 00:06:01,708 - 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. 2026-01-01 00:06:01,709 - satellite_download_logger - INFO - --------------------------------------------------------------------------------------------------------------------- 2026-01-01 00:06:01,710 - satellite_download_logger - INFO - Extracting shorelines for L5 Minimum Shoreline Length: 500 2026-01-01 00:06:01,712 - satellite_download_logger - INFO - WARNING: CoastSat has hard-coded the value for the minimum shoreline length for L7 to 200 2026-01-01 00:06:01,712 - satellite_download_logger - INFO - Extracting shorelines for L7 Minimum Shoreline Length: 200 2026-01-01 00:06:01,713 - satellite_download_logger - INFO - Extracting shorelines for L8 Minimum Shoreline Length: 500 2026-01-01 00:06:01,716 - satellite_download_logger - INFO - L8 2025-12-17-22-00-54 cloud cover : 0.00% 2026-01-01 00:06:01,728 - satellite_download_logger - INFO - L8 2025-12-17-22-00-54: sand: 0.00% ,whitewater: 0.00% ,water: 0.00% 2026-01-01 00:06:01,728 - satellite_download_logger - INFO - L8 2025-12-17-22-00-54: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 2026-01-01 00:06:01,730 - satellite_download_logger - ERROR - L8 2025-12-17-22-00-54: 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. 2026-01-01 00:06:01,760 - satellite_download_logger - INFO - L8 2025-12-17-22-01-18 cloud cover : 0.68% 2026-01-01 00:06:01,965 - satellite_download_logger - INFO - L8 2025-12-17-22-01-18: sand: 0.00% ,whitewater: 3.28% ,water: 40.54% 2026-01-01 00:06:01,967 - satellite_download_logger - INFO - L8 2025-12-17-22-01-18: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 2026-01-01 00:06:01,972 - satellite_download_logger - INFO - Number of shorelines before removing shorelines < 500m: 14 shorelines. Number of shorelines after filtering shorelines: 3 shorelines 2026-01-01 00:06:01,972 - satellite_download_logger - INFO - Number of shoreline points before removing points within 300m of cloud mask 620 2026-01-01 00:06:01,991 - satellite_download_logger - INFO - Number of shoreline points after removing points within 300m of cloud mask 620 2026-01-01 00:06:01,991 - satellite_download_logger - INFO - Number of shoreline points before removing points within 30m of no data pixel 620 2026-01-01 00:06:01,991 - satellite_download_logger - INFO - Number of shoreline points after removing points within 30m of no data pixel 620 2026-01-01 00:06:02,251 - satellite_download_logger - INFO - Extracting shorelines for L9 Minimum Shoreline Length: 500 2026-01-01 00:06:02,281 - satellite_download_logger - INFO - L9 2025-12-09-22-01-21 cloud cover : 0.00% 2026-01-01 00:06:02,449 - satellite_download_logger - INFO - L9 2025-12-09-22-01-21: sand: 0.00% ,whitewater: 0.08% ,water: 50.46% 2026-01-01 00:06:02,451 - satellite_download_logger - INFO - L9 2025-12-09-22-01-21: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 2026-01-01 00:06:02,454 - satellite_download_logger - INFO - Number of shorelines before removing shorelines < 500m: 1 shorelines. Number of shorelines after filtering shorelines: 1 shorelines 2026-01-01 00:06:02,454 - satellite_download_logger - INFO - Number of shoreline points before removing points within 300m of cloud mask 520 2026-01-01 00:06:02,454 - satellite_download_logger - INFO - Number of shoreline points after removing points within 300m of cloud mask 520 2026-01-01 00:06:02,454 - satellite_download_logger - INFO - Number of shoreline points before removing points within 30m of no data pixel 520 2026-01-01 00:06:02,454 - satellite_download_logger - INFO - Number of shoreline points after removing points within 30m of no data pixel 520