Update app.py

app.py

@@ -121,11 +121,9 @@ def get_dem_slope_maps(buffer_ee_geometry):
 
     # Calculate the minimum and maximum values
     stats = contours.reduceRegion(reducer=ee.Reducer.minMax(),scale=30,maxPixels=1e13)
-    
-    # Print the results
     max_value = stats.get('contours_max').getInfo()
-
-    vis_params = {"min": 0, "max": max_value, "palette": ["blue", "green", "yellow", "red"]}
+    min_value = stats.get('contours_min').getInfo()
+    vis_params = {"min": min_value, "max": max_value, "palette": ["blue", "green", "yellow", "red"]}
     dem_map.addLayer(contours, vis_params, "Contours")
     # Create a colormap
     colormap = cm.LinearColormap(colors=vis_params['palette'], vmin=vis_params['min'], vmax=vis_params['max'])
@@ -134,8 +132,12 @@ def get_dem_slope_maps(buffer_ee_geometry):
     # Create the map for Slope
     slope_map = gee_folium.Map()
     # Calculate slope from the DEM
-    slope_layer = ee.Terrain.slope(ee.Image("USGS/SRTMGL1_003")).clip(buffer_ee_geometry)  
-    vis_params = {"min": 0, "max": 20, "palette": ["blue", "green", "yellow", "red"]}
+    slope_layer = ee.Terrain.slope(ee.Image("USGS/SRTMGL1_003")).clip(buffer_ee_geometry).rename('slope')  
+    # Calculate the minimum and maximum values
+    stats = slope_layer.reduceRegion(reducer=ee.Reducer.minMax(),scale=30,maxPixels=1e13)
+    max_value = stats.get('slope_max').getInfo()
+    min_value = 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
     colormap = cm.LinearColormap(colors=vis_params['palette'], vmin=vis_params['min'], vmax=vis_params['max'])