diff --git a/DistrictHeatingNetworkCreator.py b/DistrictHeatingNetworkCreator.py
index 904d56b..b436d22 100644
--- a/DistrictHeatingNetworkCreator.py
+++ b/DistrictHeatingNetworkCreator.py
@@ -35,18 +35,22 @@ class DistrictHeatingNetworkCreator:
         with open(self.buildings_file, 'r') as file:
             city = json.load(file)
 
-        # Extract centroids from building data
+        # Extract centroids and building IDs from building data
         centroids = []
+        building_ids = []  # List to store building IDs
         buildings = city['features']
         for building in buildings:
             coordinates = building['geometry']['coordinates'][0]
             building_polygon = Polygon(coordinates)
             centroid = building_polygon.centroid
             centroids.append(centroid)
+            building_ids.append(building['id'])  # Extract building ID
 
-        # Convert centroids to a GeoDataFrame
-        self.centroids_gdf = gpd.GeoDataFrame(geometry=[Point(centroid.x, centroid.y) for centroid in centroids],
-                                              crs='EPSG:4326')
+        # Convert centroids to a GeoDataFrame and include building IDs
+        self.centroids_gdf = gpd.GeoDataFrame({
+            'geometry': [Point(centroid.x, centroid.y) for centroid in centroids],
+            'building_id': building_ids  # Add building IDs as a column
+        }, crs='EPSG:4326')
 
         # Load road data
         self.gdf_road = gpd.read_file(self.roads_file)
@@ -126,15 +130,12 @@ class DistrictHeatingNetworkCreator:
         G = nx.Graph()
 
         # Convert centroids to EPSG:4326 for Google Maps compatibility
-        centroids_4326 = self.centroids_gdf.to_crs(epsg=4326)
-
-        # Add centroids and nearest points as nodes with additional attributes
-        for idx, (centroid, centroid_4326) in enumerate(zip(self.centroids_gdf.geometry, centroids_4326.geometry)):
+        for idx, row in self.centroids_gdf.iterrows():
             building_name = f"Building_{idx + 1}"
-            G.add_node((centroid.x, centroid.y),
+            G.add_node((row.geometry.x, row.geometry.y),
                        type='centroid',
                        name=building_name,
-                       building_centroid=(centroid_4326.x, centroid_4326.y))
+                       building_id=row['building_id'])  # Add building ID as an attribute
 
         for point in self.nearest_points:
             G.add_node((point.x, point.y), type='nearest_point')
diff --git a/main.py b/main.py
index 620ea92..0caa03d 100644
--- a/main.py
+++ b/main.py
@@ -10,4 +10,5 @@ network_creator = DistrictHeatingNetworkCreator(
 network_graph = network_creator.run()
 
 # Plot the network graph (optional)
-network_creator.plot_network_graph(network_graph)
+for node, attrs in network_graph.nodes(data=True):
+    print(f"Node: {node}, Attributes: {attrs}")