diff --git a/src/GOSTnetsraster/market_access.py b/src/GOSTnetsraster/market_access.py
index 4d99a97..b701c4a 100644
--- a/src/GOSTnetsraster/market_access.py
+++ b/src/GOSTnetsraster/market_access.py
@@ -297,12 +297,14 @@ def generate_feature_vectors(network_r, mcp, inH, threshold, featIdx, verbose=Tr
     final = gpd.GeoDataFrame(complete_shapes, columns=["geometry", "threshold", "IDX"], crs=network_r.crs)
     return(final)
     
-def generate_market_sheds(inR, inH, out_file='', verbose=True, factor=1000, bandIdx=0):
+def generate_market_sheds(inR, inH, out_file='', verbose=True, factor=1000, bandIdx=0, column_id=None, reclass=True):
     ''' identify pixel-level maps of market sheds based on travel time    
     INPUTS
         inR [rasterio] - raster from which to grab index for calculations in MCP
         inH [geopandas data frame] - geopandas data frame of destinations
         factor [int] - value by which to multiply raster 
+        column_id [int] - column with unique identifiers in inH
+        reclass [boolean] - if True, sheds will be remapped to their original index (or column_id value). If False (old default), code generates a new index for sheds based on the order of the array.
         
     RETURNS
         [numpy array] - marketsheds by index
@@ -317,17 +319,19 @@ def generate_market_sheds(inR, inH, out_file='', verbose=True, factor=1000, band
     # In order to calculate the marketsheds, the input array needs to be NxN shape, 
     #   at the end, we will select out the original shape in order to write to file
     max_speed = xx.max()
+    xx[xx < 0] = max_speed # untraversable
     if xx.shape[0] < xx.shape[1]:
         extra_size = np.zeros([(xx.shape[1] - xx.shape[0]), xx.shape[1]]) + max_speed
         new_xx = np.vstack([xx, extra_size])
         
     if xx.shape[1] < xx.shape[0]:
-        extra_size = np.zeros([(xx.shape[0] - xx.shape[1]), xx.shape[0]]) + max_speed
+        extra_size = np.zeros([xx.shape[0], (xx.shape[0] - xx.shape[1])]) + max_speed
         new_xx = np.hstack([xx, extra_size])        
-    mcp = graph.MCP_Geometric(new_xx)
+    mcp = graph.MCP_Geometric(xx)
     
-    
-    dests = get_mcp_dests(inR, inH)    
+    dests = get_mcp_dests(inR, inH, makeset=False)
+    if column_id:
+        destinations_ids = list(inH[column_id])
     costs, traceback = mcp.find_costs(dests)
     
     offsets = _mcp.make_offsets(2, True)
@@ -346,6 +350,25 @@ def generate_market_sheds(inR, inH, out_file='', verbose=True, factor=1000, band
     ), shape=[traceback.size, traceback.size]).tocsr()
     n, components = sparse.csgraph.connected_components(g)
     basins = components.reshape(costs.shape)
+    
+    # get original index
+    if reclass:
+        dest_idx = []
+        for dest_coords in dests:
+            dest_id = neighbor_ids[dest_coords[0], dest_coords[1]]
+            dest_idx.append(dest_id)
+        
+        basins_reclass = basins.copy()
+        for i, dest in enumerate(dests):
+            basins_value = basins[dest[0], dest[1]]
+            if column_id:
+                basins_reclass[basins==basins_value] = destinations_ids[i]
+            else:
+                basins_reclass[basins==basins_value] = i
+            # print(f"Reclassify {basins_value} to {i}
+        
+        basins = basins_reclass.copy()
+    
     out_basins = basins[:orig_shape[0], :orig_shape[1]]
     if out_file != '':
         meta = inR.meta.copy()