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| import ee | |
| import geemap | |
| import ipywidgets as widgets | |
| from IPython.display import display | |
| import solara | |
| class Map(geemap.Map): | |
| def __init__(self, **kwargs): | |
| super().__init__(**kwargs) | |
| self.add_basemap("Esri.WorldImagery") | |
| self.add_ee_data() | |
| self.add_buttons(add_header=True) | |
| def add_ee_data(self): | |
| dataset = ee.Image("JRC/GSW1_4/GlobalSurfaceWater") | |
| image = dataset.select(["occurrence"]) | |
| vis_params = { | |
| "min": 0.0, | |
| "max": 100.0, | |
| "palette": ["ffffff", "ffbbbb", "0000ff"], | |
| } | |
| self.addLayer(image, vis_params, "Occurrence") | |
| self.add_colorbar( | |
| vis_params, label="Water occurrence (%)", layer_name="Occurrence" | |
| ) | |
| def add_buttons(self, position="topright", **kwargs): | |
| padding = "0px 5px 0px 5px" | |
| widget = widgets.VBox(layout=widgets.Layout(padding=padding)) | |
| layout = widgets.Layout(width="auto") | |
| style = {"description_width": "initial"} | |
| hist_btn = widgets.Button(description="Occurrence", layout=layout) | |
| bar_btn = widgets.Button(description="Monthly history", layout=layout) | |
| reset_btn = widgets.Button(description="Reset", layout=layout) | |
| scale = widgets.IntSlider( | |
| min=30, max=1000, value=90, description="Scale", layout=layout, style=style | |
| ) | |
| month_slider = widgets.IntRangeSlider( | |
| description="Months", | |
| value=[5, 10], | |
| min=1, | |
| max=12, | |
| step=1, | |
| layout=layout, | |
| style=style, | |
| ) | |
| widget.children = [ | |
| widgets.HBox([hist_btn, bar_btn, reset_btn]), | |
| month_slider, | |
| scale, | |
| ] | |
| self.add_widget(widget, position=position, **kwargs) | |
| output = widgets.Output() | |
| self.add_widget(output, position="bottomleft", add_header=False) | |
| def hist_btn_click(b): | |
| region = self.user_roi | |
| if region is not None: | |
| output.clear_output() | |
| output.append_stdout("Computing histogram...") | |
| image = ee.Image("JRC/GSW1_4/GlobalSurfaceWater").select(["occurrence"]) | |
| self.default_style = {"cursor": "wait"} | |
| hist = geemap.image_histogram( | |
| image, | |
| region, | |
| scale=scale.value, | |
| height=350, | |
| width=550, | |
| x_label="Water Occurrence (%)", | |
| y_label="Pixel Count", | |
| layout_args={ | |
| "title": dict(x=0.5), | |
| "margin": dict(l=0, r=0, t=10, b=0), | |
| }, | |
| return_df=False, | |
| ) | |
| with output: | |
| output.clear_output() | |
| display(hist) | |
| self.default_style = {"cursor": "default"} | |
| else: | |
| output.clear_output() | |
| with output: | |
| output.append_stdout("Please draw a region of interest first.") | |
| hist_btn.on_click(hist_btn_click) | |
| def bar_btn_click(b): | |
| region = self.user_roi | |
| if region is not None: | |
| self.default_style = {"cursor": "wait"} | |
| output.clear_output() | |
| output.append_stdout("Computing monthly history...") | |
| bar = geemap.jrc_hist_monthly_history( | |
| region=region, | |
| scale=scale.value, | |
| height=350, | |
| width=550, | |
| layout_args={ | |
| "title": dict(x=0.5), | |
| "margin": dict(l=0, r=0, t=10, b=0), | |
| }, | |
| frequency="month", | |
| start_month=month_slider.value[0], | |
| end_month=month_slider.value[1], | |
| denominator=1e4, | |
| y_label="Area (ha)", | |
| ) | |
| with output: | |
| output.clear_output() | |
| display(bar) | |
| self.default_style = {"cursor": "default"} | |
| else: | |
| output.clear_output() | |
| with output: | |
| output.append_stdout("Please draw a region of interest first.") | |
| bar_btn.on_click(bar_btn_click) | |
| def reset_btn_click(b): | |
| self._draw_control.clear() | |
| output.clear_output() | |
| reset_btn.on_click(reset_btn_click) | |
| def Page(): | |
| with solara.Column(style={"min-width": "500px"}): | |
| Map.element( | |
| center=[20, -0], | |
| zoom=2, | |
| height="750px", | |
| zoom_ctrl=False, | |
| measure_ctrl=False, | |
| ) | |