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 2025-05-05-22-13-36 INFO - L8 2025-05-05-22-13-36 cloud cover : 0.00% INFO - L8 2025-05-05-22-13-36: sand: 0.00% ,whitewater: 0.00% ,water: 59.14% INFO - L8 2025-05-05-22-13-36: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 INFO - Number of shorelines before removing shorelines < 500m: 2 shorelines. Number of shorelines after filtering shorelines: 1 shorelines INFO - Number of shoreline points before removing points within 300m of cloud mask 106 INFO - Number of shoreline points after removing points within 300m of cloud mask 106 INFO - Number of shoreline points before removing points within 30m of no data pixel 106 INFO - Number of shoreline points after removing points within 30m of no data pixel 106 INFO - Processing image L8 2025-05-05-22-14-00 INFO - L8 2025-05-05-22-14-00 cloud cover : 0.00% INFO - L8 2025-05-05-22-14-00: sand: 0.00% ,whitewater: 0.00% ,water: 59.03% INFO - L8 2025-05-05-22-14-00: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 INFO - Number of shorelines before removing shorelines < 500m: 2 shorelines. Number of shorelines after filtering shorelines: 1 shorelines INFO - Number of shoreline points before removing points within 300m of cloud mask 106 INFO - Number of shoreline points after removing points within 300m of cloud mask 106 INFO - Number of shoreline points before removing points within 30m of no data pixel 106 INFO - Number of shoreline points after removing points within 30m of no data pixel 106 INFO - Processing image L8 2025-05-12-22-19-47 INFO - L8 2025-05-12-22-19-47 cloud cover : 0.00% INFO - L8 2025-05-12-22-19-47: sand: 0.00% ,whitewater: 0.00% ,water: 1.59% INFO - L8 2025-05-12-22-19-47: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 ERROR - L8 2025-05-12-22-19-47: 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. INFO - Processing image L8 2025-05-21-22-13-39 INFO - L8 2025-05-21-22-13-39 cloud cover : 0.00% INFO - L8 2025-05-21-22-13-39: sand: 0.00% ,whitewater: 1.67% ,water: 54.30% INFO - L8 2025-05-21-22-13-39: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 INFO - Number of shorelines before removing shorelines < 500m: 3 shorelines. Number of shorelines after filtering shorelines: 1 shorelines INFO - Number of shoreline points before removing points within 300m of cloud mask 106 INFO - Number of shoreline points after removing points within 300m of cloud mask 106 INFO - Number of shoreline points before removing points within 30m of no data pixel 106 INFO - Number of shoreline points after removing points within 30m of no data pixel 106 INFO - Processing image L8 2025-05-21-22-14-03 INFO - L8 2025-05-21-22-14-03 cloud cover : 0.00% INFO - L8 2025-05-21-22-14-03: sand: 0.00% ,whitewater: 2.20% ,water: 53.41% INFO - L8 2025-05-21-22-14-03: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 INFO - Number of shorelines before removing shorelines < 500m: 4 shorelines. Number of shorelines after filtering shorelines: 1 shorelines INFO - Number of shoreline points before removing points within 300m of cloud mask 106 INFO - Number of shoreline points after removing points within 300m of cloud mask 106 INFO - Number of shoreline points before removing points within 30m of no data pixel 106 INFO - Number of shoreline points after removing points within 30m of no data pixel 106 INFO - Extracting shorelines for L9 Minimum Shoreline Length: 500 INFO - Processing image L9 2025-05-20-22-19-54 INFO - L9 2025-05-20-22-19-54 cloud cover : 0.00% INFO - L9 2025-05-20-22-19-54: sand: 0.00% ,whitewater: 0.40% ,water: 55.30% INFO - L9 2025-05-20-22-19-54: Less than 50 sand pixels detected within reference shoreline buffer. Using find_wl_contours1 INFO - Number of shorelines before removing shorelines < 500m: 3 shorelines. Number of shorelines after filtering shorelines: 1 shorelines INFO - Number of shoreline points before removing points within 300m of cloud mask 104 INFO - Number of shoreline points after removing points within 300m of cloud mask 104 INFO - Number of shoreline points before removing points within 30m of no data pixel 104 INFO - Number of shoreline points after removing points within 30m of no data pixel 104