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| import ee | |
| import geemap | |
| import solara | |
| import ipywidgets as widgets | |
| ee.Authenticate() | |
| # Initialize the library. | |
| ee.Initialize(project='ovcrge-ssec-burn-scar-map-c116', opt_url='https://earthengine-highvolume.googleapis.com') | |
| fireList = ["North Complex", "Dixie", "Cameron Peak", "August Complex"] | |
| selected_fire = solara.reactive(fireList[0]) | |
| selected_days = solara.reactive(30) | |
| dNBRvisParams = {'min': 0.0,'max': 0.8, 'palette': ['green', 'yellow','orange','red']} | |
| class Map(geemap.Map): | |
| def __init__(self, **kwargs): | |
| super().__init__(**kwargs) | |
| 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 customize_ee_data(self, fire, elapDays): | |
| elapDayNum = ee.Number(elapDays) | |
| elapDay_plusOne = elapDayNum.add(ee.Number(1)) | |
| north_startDate = ee.Date('2020-08-16') | |
| dixie_startDate = ee.Date('2021-07-13') | |
| cam_startDate = ee.Date('2020-08-13') | |
| aug_startDate = ee.Date('2020-08-15') | |
| 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) | |
| def calc_nbr(pre_start, pre_stop, post_start, post_stop, bbox): | |
| PREgoesCMI = ee.ImageCollection('NOAA/GOES/17/MCMIPC').filter(ee.Filter.date(pre_start, pre_stop))\ | |
| .filter(ee.Filter.calendarRange(17, 21, 'hour')).mean() | |
| POSTgoesCMI = ee.ImageCollection('NOAA/GOES/17/MCMIPC').filter(ee.Filter.date(post_start, post_stop))\ | |
| .filter(ee.Filter.calendarRange(17, 21, 'hour')).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 | |
| 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) | |
| self.addLayer(north_complex, dNBRvisParams, 'North Complex GOES NBR', True) | |
| self.centerObject(north_complex_bb, 9) | |
| elif fire == "Dixie": | |
| dixie = calc_nbr(dixie_startDate.advance(-7, 'day'), dixie_startDate, dixie_startDate.advance(elapDayNum, 'day'), dixie_startDate.advance(elapDay_plusOne,'day'), dixie_bb) | |
| self.addLayer(dixie, dNBRvisParams, 'Dixie Complex GOES NBR', True) | |
| self.centerObject(dixie_bb, 9) | |
| elif fire == "Cameron Peak": | |
| cam_peak = calc_nbr(cam_startDate.advance(-7, 'day'), cam_startDate, cam_startDate.advance(elapDayNum, 'day'), cam_startDate.advance(elapDay_plusOne,'day'), cam_peak_bb) | |
| self.addLayer(cam_peak, dNBRvisParams, 'Cameron Peak GOES NBR', True) | |
| self.centerObject(cam_peak_bb, 9) | |
| 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) | |
| self.centerObject(aug_complex_bb, 9) | |
| def clear_specific_layers(self): | |
| layers_to_keep = ['OpenStreetMap'] | |
| layers = list(self.layers) | |
| 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:') | |
| def on_selector_change(change): | |
| if change['name'] == 'value': | |
| selected_fire.value = change['new'] | |
| self.customize_ee_data(selected_fire.value, selected_days.value) | |
| selector.observe(on_selector_change, names='value') | |
| self.add_widget(selector, position="topleft") | |
| def add_intSlider(self): | |
| slider = widgets.IntSlider(value=selected_days.value,min=1,max=30,step=1,description='Elapsed days:',) | |
| def on_slider_change(change): | |
| if change['name'] == 'value': | |
| selected_days.value = change['new'] | |
| self.customize_ee_data(selected_fire.value, selected_days.value) | |
| slider.observe(on_slider_change, names='value') | |
| self.add_widget(slider, position="topleft") | |
| def Page(): | |
| with solara.Column(align="center"): | |
| markdown = """ | |
| ## Burn Map Generator Case Studies """ | |
| solara.Markdown(markdown) | |
| # Isolation is required to prevent the map from overlapping navigation (when screen width < 960px) | |
| with solara.Column(style={"isolation": "isolate"}): | |
| map_widget = Map.element( | |
| center=[39, -120.5], | |
| zoom=8, | |
| height="600px", | |
| toolbar_ctrl=False | |
| ) |