INFO - Please read the following information carefully: 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. 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. INFO - --------------------------------------------------------------------------------------------------------------------- INFO - Extracting shorelines for L5 Minimum Shoreline Length: 500 INFO - WARNING: CoastSat has hard-coded the value for the minimum shoreline length for L7 to 200 INFO - Extracting shorelines for L7 Minimum Shoreline Length: 200 INFO - Extracting shorelines for L8 Minimum Shoreline Length: 500 INFO - Processing image L8 2025-05-03-22-25-34 INFO - L8 2025-05-03-22-25-34 cloud cover : 2.66% INFO - L8 2025-05-03-22-25-34: sand: 0.00% ,whitewater: 0.24% ,water: 53.76% INFO - L8 2025-05-03-22-25-34: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 INFO - Number of shorelines before removing shorelines < 500m: 23 shorelines. Number of shorelines after filtering shorelines: 4 shorelines INFO - Number of shoreline points before removing points within 300m of cloud mask 1222 INFO - Number of shoreline points after removing points within 300m of cloud mask 1054 INFO - Number of shoreline points before removing points within 30m of no data pixel 1054 INFO - Number of shoreline points after removing points within 30m of no data pixel 1054 INFO - Processing image L8 2025-05-03-22-25-58 INFO - L8 2025-05-03-22-25-58 cloud cover : 2.35% INFO - L8 2025-05-03-22-25-58: sand: 0.00% ,whitewater: 0.28% ,water: 53.79% INFO - L8 2025-05-03-22-25-58: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 INFO - Number of shorelines before removing shorelines < 500m: 23 shorelines. Number of shorelines after filtering shorelines: 4 shorelines INFO - Number of shoreline points before removing points within 300m of cloud mask 1246 INFO - Number of shoreline points after removing points within 300m of cloud mask 1056 INFO - Number of shoreline points before removing points within 30m of no data pixel 1056 INFO - Number of shoreline points after removing points within 30m of no data pixel 1056 INFO - Extracting shorelines for L9 Minimum Shoreline Length: 500 INFO - Processing image L9 2025-03-08-22-26-14 INFO - L9 2025-03-08-22-26-14 cloud cover : 0.28% INFO - L9 2025-03-08-22-26-14: sand: 0.00% ,whitewater: 0.02% ,water: 55.14% INFO - L9 2025-03-08-22-26-14: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 INFO - Number of shorelines before removing shorelines < 500m: 16 shorelines. Number of shorelines after filtering shorelines: 5 shorelines INFO - Number of shoreline points before removing points within 300m of cloud mask 1446 INFO - Number of shoreline points after removing points within 300m of cloud mask 1321 INFO - Number of shoreline points before removing points within 30m of no data pixel 1321 INFO - Number of shoreline points after removing points within 30m of no data pixel 1321 INFO - Processing image L9 2025-03-08-22-26-38 INFO - L9 2025-03-08-22-26-38 cloud cover : 0.00% INFO - L9 2025-03-08-22-26-38: sand: 0.00% ,whitewater: 0.03% ,water: 55.34% INFO - L9 2025-03-08-22-26-38: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 INFO - Number of shorelines before removing shorelines < 500m: 10 shorelines. Number of shorelines after filtering shorelines: 5 shorelines INFO - Number of shoreline points before removing points within 300m of cloud mask 1658 INFO - Number of shoreline points after removing points within 300m of cloud mask 1658 INFO - Number of shoreline points before removing points within 30m of no data pixel 1658 INFO - Number of shoreline points after removing points within 30m of no data pixel 1658 ERROR - Skipping L9 2025-03-24-22-26-03 due to cloud cover percentage exceeding cloud threshold: 76.41% > 10.00%. ERROR - Skipping L9 2025-03-24-22-26-27 due to cloud cover percentage exceeding cloud threshold: 75.32% > 10.00%. ERROR - Skipping L9 2025-04-09-22-26-02 due to cloud cover percentage exceeding cloud threshold: 76.92% > 10.00%. ERROR - Skipping L9 2025-04-09-22-26-26 due to cloud cover percentage exceeding cloud threshold: 72.65% > 10.00%. INFO - Processing image L9 2025-04-18-22-20-13 INFO - L9 2025-04-18-22-20-13 cloud cover : 0.00% INFO - L9 2025-04-18-22-20-13: sand: 0.00% ,whitewater: 0.00% ,water: 0.00% INFO - L9 2025-04-18-22-20-13: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 ERROR - L9 2025-04-18-22-20-13: 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/python3.10/site-packages/coastsat/SDS_shoreline.py", line 686, in extract_shorelines contours_mwi, t_mndwi = find_wl_contours1( File "/home/ubuntu/.local/lib/python3.10/site-packages/coastsat/SDS_shoreline.py", line 981, in find_wl_contours1 raise ValueError("no valid pixels found in reference shoreline buffer.") ValueError: no valid pixels found in reference shoreline buffer. ERROR - Skipping L9 2025-04-25-22-25-53 due to cloud cover percentage exceeding cloud threshold: 93.64% > 10.00%. ERROR - Skipping L9 2025-04-25-22-26-17 due to cloud cover percentage exceeding cloud threshold: 86.18% > 10.00%. INFO - Processing image L9 2025-05-04-22-20-05 INFO - L9 2025-05-04-22-20-05 cloud cover : 0.00% INFO - L9 2025-05-04-22-20-05: sand: 0.00% ,whitewater: 0.00% ,water: 2.60% INFO - L9 2025-05-04-22-20-05: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 ERROR - L9 2025-05-04-22-20-05: 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/python3.10/site-packages/coastsat/SDS_shoreline.py", line 686, in extract_shorelines contours_mwi, t_mndwi = find_wl_contours1( File "/home/ubuntu/.local/lib/python3.10/site-packages/coastsat/SDS_shoreline.py", line 981, in find_wl_contours1 raise ValueError("no valid pixels found in reference shoreline buffer.") ValueError: no valid pixels found in reference shoreline buffer.