update app.py

app.py

@@ -53,6 +53,16 @@ st.header("Earth Engine Index Calculator")
 # Choose Index or Custom Formula
 index_choice = st.selectbox("Select an Index or Enter Custom Formula", ['NDVI', 'NDWI', 'Average NO₂', 'Custom Formula'])
 
+# Display corresponding formula based on the index selected
+if index_choice == 'NDVI':
+    st.write("Formula for NDVI: NDVI = (B8 - B4) / (B8 + B4)")
+elif index_choice == 'NDWI':
+    st.write("Formula for NDWI: NDWI = (B3 - B8) / (B3 + B8)")
+elif index_choice == 'Average NO₂':
+    st.write("Formula for Average NO₂: Average NO₂ = Mean(NO2 band)")
+elif index_choice == 'Custom Formula' and custom_formula:
+    st.write(f"Custom Formula: {custom_formula}")
+
 # Enter custom formula if selected
 custom_formula = ""
 if index_choice == 'Custom Formula':
@@ -267,9 +277,15 @@ if file_upload:
     # Generate the dynamic filename
     filename = f"{main_selection}_{sub_selection}_{start_date.strftime('%Y/%m/%d')}_{end_date.strftime('%Y/%m/%d')}_{shape_type}.csv"
 
-    # Convert results to DataFrame for download
     if st.session_state.results:
+        # Convert the results to a DataFrame for better visualization
         result_df = pd.DataFrame(st.session_state.results)
+        
+        # Show the results in a table format
+        st.write("Processed Results Table:")
+        st.dataframe(result_df)  
+
+        # Allow user to download results as CSV
         st.download_button(
             label="Download results as CSV",
             data=result_df.to_csv(index=False).encode('utf-8'),