update app.py

app.py

@@ -3,16 +3,19 @@ import json
 import ee
 import geemap
 import os
+import time  # For simulating delay during map loading
 
 st.set_page_config(layout="wide")
+
+# Custom styling for the button
 m = st.markdown(
     """
-<style>
-div.stButton > button:first-child {
-    background-color: #006400;
-    color:#ffffff;
-}
-</style>""",
+    <style>
+    div.stButton > button:first-child {
+        background-color: #006400;
+        color:#ffffff;
+    }
+    </style>""",
     unsafe_allow_html=True,
 )
 
@@ -26,18 +29,6 @@ with open(os.path.expanduser("~/.config/earthengine/credentials"), "w") as f:
 
 ee.Initialize(project='ee-yashsacisro24')
 
-import streamlit as st
-import ee
-import geemap
-import json
-
-# Initialize Earth Engine
-try:
-    ee.Initialize()
-except ee.EEException as e:
-    st.error("Error initializing Earth Engine. Ensure your credentials are set up.")
-    st.stop()
-
 # Load Sentinel dataset options from JSON file
 with open("sentinel_datasets.json") as f:
     data = json.load(f)
@@ -109,14 +100,18 @@ if st.button("Calculate Index"):
         # Visualization Parameters for Index Layers
         vis_params = {"min": 0, "max": 1, "palette": ["blue", "white", "green"]}
 
-        # If an index image is generated, add it to the map
-        if result_image:
-            Map = geemap.Map()
-            Map.setCenter(-100.0, 40.0, 4)  # Adjusted for example
-            Map.addLayer(result_image, vis_params, index_choice)
-            Map.to_streamlit(height=600)
-        else:
-            st.warning("Result image not generated; check parameters.")
-    
+        # Add loading spinner while the map is loading
+        with st.spinner('Loading the map, please wait...'):
+            time.sleep(2)  # Simulate processing delay (you can adjust/remove this in production)
+
+            # If an index image is generated, add it to the map
+            if result_image:
+                Map = geemap.Map()
+                Map.setCenter(-100.0, 40.0, 4)  # Adjusted for example
+                Map.addLayer(result_image, vis_params, index_choice)
+                Map.to_streamlit(height=600)
+            else:
+                st.warning("Result image not generated; check parameters.")
+
     except ee.EEException as e:
         st.error(f"Earth Engine Error: {e}")