Update app.py

app.py

@@ -155,7 +155,7 @@ if uploaded_file is not None:
         st.write("It has perimeter of {:.2f} meters.".format(polygon_info['perimeter']))
 
         #Change geometry of polygon 3D to 2D for ee
-        gdf.iloc[0].geometry = convert_to_2d_geometry(gdf.iloc[0].geometry)
+        gdf.loc[0, "geometry"] = convert_to_2d_geometry(gdf.iloc[0].geometry)
             
         #Read KML file
         geom_ee_object = ee.FeatureCollection(json.loads(gdf.to_json()))