Keep OpenStreetMap when layers clear

pages/burn_mapping.py

@@ -13,39 +13,13 @@ dNBRvisParams = {'min': 0.0,'max': 0.8, 'palette': ['green', 'yellow','orange','
 class Map(geemap.Map):
     def __init__(self, **kwargs):
         super().__init__(**kwargs)        
-        #self.add_ee_data()
+        self.add_basemap('OpenStreetMap')
         self.customize_ee_data(selected_fire.value, selected_days.value)
         self.add_selector()
         self.add_intSlider()
-
         self.add("layer_manager")
         self.remove("draw_control")
-    '''
-    def add_ee_data(self):
-        def calc_nbr(pre_start, pre_stop, post_start, post_stop, bbox):
-                PREgoesCMI = ee.ImageCollection('NOAA/GOES/17/MCMIPF').filter(ee.Filter.date(pre_start, pre_stop)).mean()
-                POSTgoesCMI = ee.ImageCollection('NOAA/GOES/17/MCMIPF').filter(ee.Filter.date(post_start, post_stop)).mean()
-                preNBR = PREgoesCMI.select(['CMI_C03','CMI_C06']).normalizedDifference(['CMI_C03', 'CMI_C06']).toFloat().rename('NBR')
-                postNBR = POSTgoesCMI.select(['CMI_C03','CMI_C06']).normalizedDifference(['CMI_C03', 'CMI_C06']).toFloat().rename('NBR')
-                dNBR = preNBR.subtract(postNBR).select('NBR')
-                dNBRclipped = dNBR.clip(bbox)
-                return dNBRclipped
-            
-        north_complex_bb = ee.Geometry.BBox(-121.616097, 39.426723, -120.668526, 40.030845)
-        dixie_bb = ee.Geometry.BBox(-121.680467, 39.759303, -120.065477, 40.873387)
-        cam_peak_bb = ee.Geometry.BBox(-106.014784, 40.377907, -105.116651, 40.822094)
-        aug_complex_bb = ee.Geometry.BBox(-123.668726, 39.337654, -122.355860, 40.498304)
-    
-        north_complex = calc_nbr('2020-08-15', '2020-08-16', '2020-09-15', '2020-09-16', north_complex_bb)
-        dixie = calc_nbr('2021-07-12', '2021-07-13', '2021-09-15', '2021-09-16', dixie_bb)
-        cam_peak = calc_nbr('2020-08-12', '2020-08-13', '2020-09-12', '2020-09-13', cam_peak_bb)
-        aug_complex = calc_nbr('2020-08-15', '2020-08-16', '2020-11-10', '2020-11-11', aug_complex_bb)
-            
-        self.addLayer(north_complex, dNBRvisParams, 'North Complex GOES NBR', False)
-        self.addLayer(dixie, dNBRvisParams, 'Dixie Complex GOES NBR', False)
-        self.addLayer(cam_peak, dNBRvisParams, 'Cameron Peak GOES NBR', False)
-        self.addLayer(aug_complex, dNBRvisParams, 'August Complex GOES NBR', False)
-        '''
+
         
     def customize_ee_data(self, fire, elapDays):
         elapDayNum = ee.Number(elapDays)
@@ -72,7 +46,7 @@ class Map(geemap.Map):
                 dNBRclipped = dNBR.clip(bbox)
                 return dNBRclipped
             
-        self.clear_layers()
+        self.clear_specific_layers()
         
         if fire == "North Complex": 
             north_complex = calc_nbr(north_startDate.advance(-7, 'day'), north_startDate, north_startDate.advance(elapDayNum, 'day'), north_startDate.advance(elapDay_plusOne,'day'), north_complex_bb) 
@@ -86,7 +60,13 @@ class Map(geemap.Map):
         elif fire == "August Complex":
             aug_complex = calc_nbr(aug_startDate.advance(-7, 'day'), aug_startDate, aug_startDate.advance(elapDayNum, 'day'), aug_startDate.advance(elapDay_plusOne,'day'),   aug_complex_bb)
             self.addLayer(aug_complex, dNBRvisParams, 'August Complex GOES NBR', True)
-        
+    
+    def clear_specific_layers(self):
+        layers_to_keep = ['OpenStreetMap']
+        layers = self.layers.copy()
+        for layer in layers:
+            if layer.name not in layers_to_keep:
+                self.remove_layer(layer)   
                
     def add_selector(self):
         selector = widgets.Dropdown(options=fireList, value="North Complex", description='Wildfire Case Study:') 
@@ -95,16 +75,6 @@ class Map(geemap.Map):
             if change['name'] == 'value': 
                 selected_fire.value = change['new']
                 self.customize_ee_data(selected_fire.value, selected_days.value)
-                
-                '''#self.clear_layers()
-                if selected_fire == "North Complex":    
-                    self.find_layer('North Complex GOES NBR').visible = True
-                elif selected_fire == "Dixie":
-                    self.find_layer('Dixie Complex GOES NBR').visible = True
-                elif selected_fire == "Cameron Peak":
-                    self.find_layer('Cameron Peak GOES NBR').visible = True
-                elif selected_fire == "August Complex":
-                    self.find_layer('August Complex GOES NBR').visible = True'''
 
         selector.observe(on_selector_change, names='value')
         self.add_widget(selector, position="topleft")
@@ -124,11 +94,6 @@ class Map(geemap.Map):
 @solara.component
 def Page():
     
-    #with solara.Column(style={"align":"start", "min-width": "200px", "height": "200px"}):
-        #solara.Select(label="Wildfire Case Study", value=selected_fire, values=fireList)
-        #solara.Markdown(f"**Selected**: {selected_fire.value}")
-        #solara.Button(label="Map the burn scar",) #on_click = on_button_clicked)
-    
     with solara.Column(align="center"):
         markdown = """
         ## Burn Map Generator Case Studies """