index=True.

app.py

@@ -73,8 +73,10 @@ if file_url:
         unsafe_allow_html=True,
     )
 
-    csv = stats_df.T.to_csv(index=False)
-    st.download_button("Download Geometry Metrics", csv, "geometry_metrics.csv", "text/csv", use_container_width=True)
+    csv = stats_df.T.to_csv(index=True)
+    st.download_button(
+        "Download Geometry Metrics", csv, f"{file_url}_metrics.csv", "text/csv", use_container_width=True
+    )
 
 else:
     st.warning("Please provide a KML or GeoJSON URL as a query parameter, e.g., `?file_url=<your_file_url>`")