diff --git a/output/master_data_center_spatial_clusters_map.html b/output/master_data_center_spatial_clusters_map.html
new file mode 100644
index 0000000..88b8fe4
--- /dev/null
+++ b/output/master_data_center_spatial_clusters_map.html
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diff --git a/spatial_clustering_master_data_centers.ipynb b/spatial_clustering_master_data_centers.ipynb
index 2a014f4..6efe401 100644
--- a/spatial_clustering_master_data_centers.ipynb
+++ b/spatial_clustering_master_data_centers.ipynb
@@ -1028,6 +1028,10 @@
" popup=popup,\n",
" tooltip=f'{cluster_label}; size={cluster_size}',\n",
" ).add_to(m)\n",
+ " map_out = Path('output/master_data_center_spatial_clusters_map.html')\n",
+ " map_out.parent.mkdir(exist_ok=True)\n",
+ " m.save(map_out)\n",
+ " print('Wrote:', map_out)\n",
" display(m)\n",
"except ImportError:\n",
" print('folium is not installed; skipping interactive map.')\n"