Update app.py

app.py

@@ -131,7 +131,7 @@ def add_geometry_to_maps(map_list, opacity=0.0):
 
 def get_dem_slope_maps(buffer_ee_geometry):
     # Create the map for DEM
-    dem_map = gee_folium.Map()
+    dem_map = gee_folium.Map(controls={'scale':'bottom-left'})
     dem_map.add_tile_layer(
         wayback_mapping[latest_date], name=f"Esri Wayback - {latest_date.replace('-', '/')}", attribution="Esri"
     )
@@ -172,7 +172,7 @@ def get_dem_slope_maps(buffer_ee_geometry):
                                 position='bottomright')
 
     # Create the map for Slope
-    slope_map = gee_folium.Map()
+    slope_map = gee_folium.Map(controls={'scale':'bottom-left'})
     slope_map.add_tile_layer(
         wayback_mapping[latest_date], name=f"Esri Wayback - {latest_date.replace('-', '/')}", attribution="Esri"
     )
@@ -187,8 +187,8 @@ def get_dem_slope_maps(buffer_ee_geometry):
     )
     # Calculate the minimum and maximum values
     stats = slope_layer.reduceRegion(reducer=ee.Reducer.minMax(), scale=10, maxPixels=1e13)
-    max_value = stats.get("slope_max").getInfo()
-    min_value = stats.get("slope_min").getInfo()
+    max_value = int(stats.get("slope_max").getInfo())
+    min_value = int(stats.get("slope_min").getInfo())
     vis_params = {"min": min_value, "max": max_value, "palette": ["blue", "green", "yellow", "red"]}
     slope_map.addLayer(slope_layer, vis_params, "Slope Layer")
     # Create a colormap
@@ -196,10 +196,10 @@ def get_dem_slope_maps(buffer_ee_geometry):
     #slope_map.add_child(colormap)
     tick_size=int((max_value-min_value)/4)
     slope_map.add_legend(title="Slope (degrees)",
-                                legend_dict={'{}-{} m'.format(min_value, min_value+tick_size): '#0000FF',
-                                             '{}-{} m'.format(min_value+tick_size, min_value+2*tick_size): '#00FF00',
-                                             '{}-{} m'.format(min_value+2*tick_size, min_value+3*tick_size): '#FFFF00',
-                                             '{}-{} m'.format(min_value+3*tick_size, max_value): 'FF0000'},
+                                legend_dict={'{}-{} deg'.format(min_value, min_value+tick_size): '#0000FF',
+                                             '{}-{} deg'.format(min_value+tick_size, min_value+2*tick_size): '#00FF00',
+                                             '{}-{} deg'.format(min_value+2*tick_size, min_value+3*tick_size): '#FFFF00',
+                                             '{}-{} deg'.format(min_value+3*tick_size, max_value): 'FF0000'},
                                 position='bottomright')
     return dem_map, slope_map
 
@@ -588,4 +588,7 @@ if "result" in st.session_state:
             )
             write_info(f"""<div style="text-align: center;">{title}</div>""")
             param_map.add_layer_control()
+            # Add a scale using Folium's ScaleControl
+            scale = folium.ScaleControl(position='bottomright', max_width=100)
+            param_map.add_child(scale)
             param_map.to_streamlit()