diff --git a/src/sdstools/join_model_scores.py b/src/sdstools/join_model_scores.py
index 0a72c86..3de7827 100644
--- a/src/sdstools/join_model_scores.py
+++ b/src/sdstools/join_model_scores.py
@@ -7,156 +7,185 @@
 import pandas as pd
 import os
 
-
-def join_model_scores_to_shorelines(good_bad_csv,
-                                    good_bad_seg_csv,
-                                    shorelines_path,
-                                    img_type):
+def drop_columns_if_exist(df, columns):
     """
-    Joins model scores to shoreline points
-    inputs:
-    good_bad_csv (str): path to the image suitability output csv
-    good_bad_seg_csv (str): path to the seg filter output csv
-    shorelines_path (str): path to the extracted_shorelines_points.geojson or extracted_shorelines_lines.geojson
-    img_type (str): 'RGB' 'MNDWI' or 'NDWI'.
-    outputs:
-    shorelines_path (str): path to the shoreline points with model scores joined
+    Drop columns from a DataFrame if they exist.
+    Parameters:
+    df (pd.DataFrame): DataFrame to drop columns from.
+    columns (list): List of column names to drop.
+
+    Returns:
+    pd.DataFrame: DataFrame with columns dropped.
     """
-    ##load files
-    shorelines_gdf = gpd.read_file(shorelines_path)
-    shorelines_gdf['date'] = pd.to_datetime(shorelines_gdf['date'], utc=True)
+    for col in columns:
+        if col in df.columns:
+            df.drop(columns=col, inplace=True)
+    return df
 
-    good_bad_df = pd.read_csv(good_bad_csv)
-    good_bad_seg_df = pd.read_csv(good_bad_seg_csv)
-
-    ##get image dates
-    dts = [None]*len(good_bad_df)
-    for i in range(len(good_bad_df)):
-        dt = os.path.basename(good_bad_df['im_paths'].iloc[i])
-        idx = dt.find('_RGB')
-        dt = dt[0:idx]
-        dts[i] = dt
-    good_bad_df['dates'] = dts
-    good_bad_df['dates'] = pd.to_datetime(good_bad_df['dates'], utc=True,
-                                          format='%Y-%m-%d-%H-%M-%S')
-
-    ##get seg dates
-    dts_seg = [None]*len(good_bad_seg_df)
-    for i in range(len(good_bad_seg_df)):
-        dt = os.path.basename(good_bad_seg_df['im_paths'].iloc[i])
-        idx = dt.find('_'+img_type)
-        dt = dt[0:idx]
-        dts_seg[i] = dt
-    good_bad_seg_df['dates'] = dts_seg
-    good_bad_seg_df['dates'] = pd.to_datetime(good_bad_seg_df['dates'], utc=True,
-                                          format='%Y-%m-%d-%H-%M-%S')
-
-    ##merge image scores
-    shorelines_gdf = shorelines_gdf.merge(good_bad_df,
-                                               left_on='date',
-                                               right_on='dates',
-                                               suffixes=['', '_image']
-                                                        )
-
-    ##merge seg scores
-    shorelines_gdf = shorelines_gdf.merge(good_bad_seg_df,
-                                               left_on='date',
-                                               right_on='dates',
-                                               suffixes=['', '_seg']
-                                                        )
-
-    ##clean up columns
-    cols = list(shorelines_gdf.columns)
-    keep_cols = ['date', 'satname', 'geoaccuracy', 'cloud_cover',
-                 'geometry','im_paths','model_scores','model_scores_seg']
-    for col in cols:
-        if col not in keep_cols:
-            shorelines_gdf = shorelines_gdf.drop(columns=[col])
-    shorelines_gdf.to_file(shorelines_path)
 
-    return shorelines_path
-
-def join_model_scores_to_time_series(good_bad_csv,
-                                     good_bad_seg_csv,
-                                     transect_time_series_merged_path,
-                                     img_type):
+def join_model_scores_to_time_series(transect_time_series_merged_path,
+                                     good_bad_csv=None,
+                                     good_bad_seg_csv=None):
     """
-    Joins model scores to shoreline points
-    inputs:
-    good_bad (str): path to the image suitability output csv
-    good_bad_seg (str): path to the seg filter output csv
-    transect_time_series_merged_path (str): path to raw_transect_time_series_merged.csv
-                                        or tidally_corrected_transect_time_series_merged.csv
-    img_type (str): 'RGB' 'MNDWI' or 'NDWI'.
-    outputs:
-    shorelines_path (str): path to the transect_time_series_merged.csv with model scores joined
+    Joins model scores to time series transect data based on the provided CSVs.
+    Parameters:
+    transect_time_series_merged_path (str): Path to transect time series CSV.
+    good_bad_csv (str, optional): Path to the image suitability output CSV.
+    good_bad_seg_csv (str, optional): Path to the seg filter output CSV.
+
+    Returns:
+    str: Path to the updated transect time series CSV with model scores joined.
     """
-    ##load csv
+
+    # Load transect time series data
     transect_time_series_merged = pd.read_csv(transect_time_series_merged_path)
     transect_time_series_merged['dates'] = pd.to_datetime(transect_time_series_merged['dates'], utc=True)
 
-    ##getting image dates
-    good_bad = pd.read_csv(good_bad_csv)
-    good_bad_seg = pd.read_csv(good_bad_seg_csv)
-    dts = [None]*len(good_bad)
-    for i in range(len(good_bad)):
-        dt = os.path.basename(good_bad['im_paths'].iloc[i])
-        idx = dt.find('_RGB')
-        dt = dt[0:idx]
-        dts[i] = dt
-    good_bad['dates'] = dts
-    good_bad['dates'] = pd.to_datetime(good_bad['dates'],
-                                       utc=True,
-                                       format='%Y-%m-%d-%H-%M-%S')
-    try:
-        good_bad = good_bad.drop(columns = ['Unnamed: 0.1', 'Unnamed: 0'])
-        good_bad_seg = good_bad_seg.drop(columns = ['Unnamed: 0.1', 'Unnamed: 0'])
-    except:
-        pass
-
-    ##gettting seg dates
-    dts_seg = [None]*len(good_bad_seg)
-    for i in range(len(good_bad_seg)):
-        dt = os.path.basename(good_bad_seg['im_paths'].iloc[i])
-        idx = dt.find('_'+img_type)
-        dt = dt[0:idx]
-        dts_seg[i] = dt
-    good_bad_seg['dates'] = dts_seg
-    good_bad_seg['dates'] = pd.to_datetime(good_bad_seg['dates'],
-                                           utc=True,
-                                           format='%Y-%m-%d-%H-%M-%S')
-    
-
-    ##join good_bad and good_bad_seg scores
-    transect_time_series_merged = transect_time_series_merged.merge(good_bad,
-                                                                    left_on='dates',
-                                                                    right_on='dates',
-                                                                    suffixes = ['_ts', '_image']
-                                                                    )
-    transect_time_series_merged = transect_time_series_merged.merge(good_bad_seg,
-                                                                    left_on='dates',
-                                                                    right_on='dates',
-                                                                    suffixes = ['', '_seg']
-                                                                    )
-    ##get satellite names
-    satnames = [None]*len(transect_time_series_merged)
-    for i in range(len(transect_time_series_merged)):
-        im_path = transect_time_series_merged['im_paths'].iloc[i]
-        satname = os.path.splitext(os.path.basename(im_path))[0][-2:]
-        satnames[i] = satname
-    transect_time_series_merged['satname'] = satnames
-
-    keep_cols = ['dates','x','y','transect_id','cross_distance',
-                 'shore_x','shore_y','im_paths','model_scores',
-                 'model_scores_seg','satname','tide']
-
-    ##clean up columns
-    cols = list(transect_time_series_merged.columns)
-    for col in cols:
-        if col not in keep_cols:
-            transect_time_series_merged = transect_time_series_merged.drop(columns=[col])
-
+    if good_bad_csv:
+
+        drop_columns_if_exist(transect_time_series_merged, ['classifier_model_score', 'classifier_threshold'])
+        
+        # Load and process good_bad CSV
+        good_bad = pd.read_csv(good_bad_csv)
+        good_bad['dates'] = good_bad['im_paths'].apply(lambda x: pd.to_datetime(os.path.basename(x).split('_')[0], utc=True, format='%Y-%m-%d-%H-%M-%S'))
+        
+        # Prepare merge and rename directly
+        merge_columns = ['dates', 'model_scores']
+        if 'threshold' in good_bad.columns:
+            merge_columns.append('threshold')
+        merged_df = good_bad[merge_columns]    
+        
+        transect_time_series_merged = transect_time_series_merged.merge(merged_df,
+                                                                       on='dates',
+                                                           how='left',
+                                                                       suffixes=('_ts', '_image'))
+        # Optional: drop additional unnamed columns if present
+        transect_time_series_merged.drop(columns=[col for col in transect_time_series_merged if 'Unnamed:' in col], errors='ignore', inplace=True)
+        # rename model_scores column to classifier_model_score
+        transect_time_series_merged.rename(columns={'model_scores': 'classifier_model_score'}, inplace=True)
+        if "threshold" in transect_time_series_merged:
+            transect_time_series_merged.rename(columns={'threshold': 'classifier_threshold'}, inplace=True)
+
+    if good_bad_seg_csv:
+
+        drop_columns_if_exist(transect_time_series_merged, ['segmentation_model_score', 'segmentation_threshold'])
+
+        # Load and process good_bad_seg CSV
+        good_bad_seg = pd.read_csv(good_bad_seg_csv)
+        good_bad_seg['dates'] = good_bad_seg['im_paths'].apply(lambda x: pd.to_datetime(os.path.basename(x).split('_')[0], utc=True, format='%Y-%m-%d-%H-%M-%S'))
+        
+        # Prepare merge and rename directly
+        merge_columns = ['dates', 'model_scores']
+        if 'threshold' in good_bad_seg.columns:
+            merge_columns.append('threshold')
+        merged_df = good_bad_seg[merge_columns]       
+            
+        transect_time_series_merged = transect_time_series_merged.merge(merged_df,
+                                                                       on='dates',
+                                                                       how='left',
+                                                                       suffixes=('', '_seg'))
+        # rename model_scores column to segmentation_model_score
+        transect_time_series_merged.rename(columns={'model_scores': 'segmentation_model_score'}, inplace=True)
+        if "threshold" in transect_time_series_merged:
+            transect_time_series_merged.rename(columns={'threshold': 'segmentation_threshold'}, inplace=True)
+
+    # Save updated DataFrame
     transect_time_series_merged.to_csv(transect_time_series_merged_path)
-    
+
     return transect_time_series_merged_path
 
+def join_model_scores_to_shorelines(shorelines_path,
+                                    good_bad_csv=None,
+                                    good_bad_seg_csv=None):
+    """
+    Joins model scores to shoreline points based on the provided CSVs.
+    Parameters:
+    shorelines_path (str): path to the extracted shorelines geojson.
+    good_bad_csv (str, optional): path to the image suitability output CSV.
+    good_bad_seg_csv (str, optional): path to the seg filter output CSV.
+
+    Returns:
+    str: path to the shoreline points with model scores joined.
+    """
+    # Load shorelines data
+    shorelines_gdf = gpd.read_file(shorelines_path)
+    shorelines_gdf['date'] = pd.to_datetime(shorelines_gdf['date'], utc=True)
+
+    if good_bad_csv:
+        good_bad_df = pd.read_csv(good_bad_csv)
+        good_bad_df['dates'] = good_bad_df['im_paths'].apply(lambda x: pd.to_datetime(os.path.basename(x).split('_')[0], utc=True, format='%Y-%m-%d-%H-%M-%S'))
+        
+        # Drop old scores if they exist
+        drop_columns_if_exist(shorelines_gdf, ['classifier_model_score', 'classifier_threshold'])
+
+        # Prepare merge and rename directly
+        merge_columns = ['dates', 'model_scores']
+        if 'threshold' in good_bad_df.columns:
+            merge_columns.append('threshold')
+        merged_df = good_bad_df[merge_columns]
+        
+        shorelines_gdf = shorelines_gdf.merge(merged_df,
+                                              left_on='date', right_on='dates',
+                                              suffixes=('', '_image'))
+        
+        #rename model_scores to classifer_model_score
+        shorelines_gdf.rename(columns={'model_scores': 'classifier_model_score'}, inplace=True)
+        if "threshold" in shorelines_gdf:
+            shorelines_gdf.rename(columns={'threshold': 'classifier_threshold'}, inplace=True)
+
+    if good_bad_seg_csv:
+        good_bad_seg_df = pd.read_csv(good_bad_seg_csv)
+        good_bad_seg_df['dates'] = good_bad_seg_df['im_paths'].apply(lambda x: pd.to_datetime(os.path.basename(x).split('_')[0], utc=True, format='%Y-%m-%d-%H-%M-%S'))
+        
+        # Drop old scores if they exist
+        drop_columns_if_exist(shorelines_gdf, ['segmentation_model_score', 'segmentation_threshold'])
+
+        # Prepare merge and rename directly
+        merge_columns = ['dates', 'model_scores']
+        if 'threshold' in good_bad_seg_df.columns:
+            merge_columns.append('threshold')
+        merged_df = good_bad_seg_df[merge_columns]       
+        
+        shorelines_gdf = shorelines_gdf.merge(merged_df,
+                                              left_on='date', right_on='dates',
+                                              suffixes=('', '_seg'))
+        # rename model_scores column to segmentation_model_score
+        shorelines_gdf.rename(columns={'model_scores': 'segmentation_model_score'}, inplace=True)
+        if "threshold" in shorelines_gdf:
+            shorelines_gdf.rename(columns={'threshold': 'segmentation_threshold'}, inplace=True)
+
+    # Save modified GeoDataFrame
+    # drop any duplicate columns
+    shorelines_gdf = shorelines_gdf.loc[:,~shorelines_gdf.columns.duplicated()]
+
+    shorelines_gdf.to_file(shorelines_path)
+
+    return shorelines_path
+
+
+# # Example #1 : join_model_scores_to_shorelines
+# good_bad_csv = r"C:\development\doodleverse\coastseg\CoastSeg\data\ID_wra5_datetime03-04-24__03_43_01\jpg_files\preprocessed\RGB\image_classification_results.csv"
+# good_bad_seg_csv = r"C:\development\doodleverse\coastseg\CoastSeg\sessions\sample_session_demo1\segmentation_classification_results.csv"
+# shorelines_path = r"C:\development\doodleverse\coastseg\CoastSeg\sessions\sample_session_demo1\extracted_shorelines_points.geojson"
+# join_model_scores_to_shorelines(shorelines_path,
+#                                     good_bad_csv,
+#                                     good_bad_seg_csv)
+
+
+# # Example #2 : join_model_scores_to_time_series
+# good_bad_csv = r"C:\development\doodleverse\coastseg\CoastSeg\data\ID_wra5_datetime03-04-24__03_43_01\jpg_files\preprocessed\RGB\image_classification_results.csv"
+# good_bad_seg_csv = r"C:\development\doodleverse\coastseg\CoastSeg\sessions\sample_session_demo1\segmentation_classification_results.csv"
+# transect_time_series_merged_path = r"C:\development\doodleverse\coastseg\CoastSeg\sessions\sample_session_demo1\raw_transect_time_series_merged.csv"
+
+# csv = pd.read_csv(transect_time_series_merged_path)
+# # drop the columns if they exist
+# columns = ['model_scores_seg','classifier_model_score','segmentation_model_score']
+# for col in columns:
+#     if col in csv.columns:
+#         csv.drop(columns=col, inplace=True)
+# # overwrite the old save
+# csv.to_csv(transect_time_series_merged_path, index=False)
+
+# join_model_scores_to_time_series(transect_time_series_merged_path,
+#                                     good_bad_csv,
+#                                     good_bad_seg_csv)
\ No newline at end of file