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import ee
import geemap
import ipyleaflet
import solara
import ipywidgets as widgets
from IPython.display import display
zoom = solara.reactive(3)
center = solara.reactive([20, 0])
def zonal_stats_chart(image, vector, **kwargs):
if isinstance(vector, ee.Geometry):
fc = ee.FeatureCollection(vector)
elif isinstance(vector, ee.FeatureCollection):
fc = vector
else:
raise ValueError(
"The vector argument must be an ee.Geometry or ee.FeatureCollection."
)
result = geemap.zonal_stats(
image, fc, statistics_type="SUM", return_fc=True, verbose=False, **kwargs
)
df = geemap.ee_to_df(result).T
df.reset_index(inplace=True)
df.columns = ["Type", "Area"]
chart = geemap.bar_chart(df, "Type", "Area", x_label='', y_label="Area (m2)")
chart.update_layout(
margin=dict(l=0, r=0, t=10, b=0),
height=280,
)
return chart
def add_analysis_gui(m=None, position='topright', opened=True):
"""Create a toolbar widget.
Args:
m (geemap.Map, optional): The geemap.Map instance. Defaults to None.
opened (bool, optional): Whether to open the toolbar. Defaults to True.
"""
fc = ee.FeatureCollection('users/giswqs/public/countries')
countries = fc.aggregate_array('NAME').getInfo()
countries.sort()
gswe = ee.ImageCollection("users/h2i_lab/gswe/gswe_datasets")
image = gswe.mosaic()
# esa = gswe.select("esa").mosaic()
# esri = gswe.select("esri").mosaic()
# jrc = gswe.select("jrc").mosaic()
# osm = gswe.select("osm").mosaic()
# hydrolakes = gswe.select("hydrolakes").mosaic()
widget_width = "270px"
padding = "0px 0px 0px 5px" # upper, right, bottom, left
toolbar_button = widgets.ToggleButton(
value=False,
tooltip="Toolbar",
icon="bar-chart",
layout=widgets.Layout(width="28px", height="28px", padding="0px 0px 0px 4px"),
)
close_button = widgets.ToggleButton(
value=False,
tooltip="Close the tool",
icon="times",
button_style="primary",
layout=widgets.Layout(height="28px", width="28px", padding="0px 0px 0px 4px"),
)
options = ["Draw an area", "Select a country"]
radio = widgets.RadioButtons(
options=options,
layout=widgets.Layout(width=widget_width, padding=padding),
style={"description_width": "initial"},
)
country = widgets.Dropdown(
options=countries,
value=None,
layout=widgets.Layout(width=widget_width, padding=padding),
)
buttons = widgets.ToggleButtons(
value=None,
options=["Apply", "Reset", "Close"],
tooltips=["Apply", "Reset", "Close"],
button_style="primary",
layout=widgets.Layout(padding="0px 2px 4px 2px"),
)
buttons.style.button_width = "88px"
label = widgets.Label("Draw an area on the map first.")
toolbar_widget = widgets.VBox()
toolbar_widget.children = [toolbar_button]
toolbar_header = widgets.HBox()
toolbar_header.children = [close_button, toolbar_button]
toolbar_footer = widgets.VBox()
toolbar_footer.children = [
radio,
buttons,
]
def change_radio(change):
if change["new"] == "Select a country":
toolbar_footer.children = [radio, country, buttons]
else:
toolbar_footer.children = [radio, buttons]
radio.observe(change_radio, "value")
m.selected_country = None
def change_country(change):
if change["new"]:
country_name = country.value
country_fc = fc.filter(ee.Filter.eq('NAME', country_name))
vec_style = {'color': '000000ff', 'width': 3, 'fillColor': '00000000'}
m.addLayer(country_fc.style(**vec_style), {}, 'Selected Country')
m.centerObject(country_fc)
m.selected_country = country_fc
toolbar_footer.children = [radio, country, buttons]
country.observe(change_country, "value")
def toolbar_btn_click(change):
if change["new"]:
close_button.value = False
toolbar_widget.children = [toolbar_header, toolbar_footer]
else:
if not close_button.value:
toolbar_widget.children = [toolbar_button]
toolbar_button.observe(toolbar_btn_click, "value")
def close_btn_click(change):
if change["new"]:
toolbar_button.value = False
if m is not None:
if m.tool_control is not None and m.tool_control in m.controls:
m.remove_control(m.tool_control)
m.tool_control = None
toolbar_widget.close()
close_button.observe(close_btn_click, "value")
def button_clicked(change):
if change["new"] == "Apply":
output = widgets.Output(
layout=widgets.Layout(width=widget_width, padding=padding)
)
if radio.value == "Select a country":
toolbar_footer.children = [radio, country, buttons, output]
else:
toolbar_footer.children = [radio, buttons, output]
with output:
output.clear_output()
buttons.value = None
if radio.value == "Draw an area":
if m.user_roi is None:
display(label)
buttons.value = None
else:
chart = zonal_stats_chart(image, m.user_roi, scale=100)
display(chart)
elif radio.value == "Select a country":
if m.selected_country is not None:
chart = zonal_stats_chart(
image, m.selected_country.geometry(), scale=100
)
display(chart)
elif change["new"] == "Reset":
country.value = None
radio.value = "Draw an area"
toolbar_footer.children = [radio, buttons]
elif change["new"] == "Close":
if m is not None:
if m.tool_control is not None and m.tool_control in m.controls:
m.remove_control(m.tool_control)
m.tool_control = None
toolbar_widget.close()
buttons.value = None
buttons.observe(button_clicked, "value")
toolbar_button.value = opened
if m is not None:
toolbar_control = ipyleaflet.WidgetControl(
widget=toolbar_widget, position=position
)
if toolbar_control not in m.controls:
m.add_control(toolbar_control)
m.tool_control = toolbar_control
else:
return toolbar_widget
class Map(geemap.Map):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.add_basemap('SATELLITE', show=False)
self.add_ee_data()
self.add_layer_manager()
add_analysis_gui(self)
# self.add_inspector()
def add_ee_data(self):
gswe = ee.ImageCollection("users/h2i_lab/gswe/gswe_datasets")
self.addLayer(gswe.select("esa"), {'palette': ['red']}, "ESA")
self.addLayer(gswe.select("esri"), {'palette': ['yellow']}, "ESRI")
self.addLayer(gswe.select("jrc"), {'palette': ['blue']}, "JRC")
self.addLayer(gswe.select("osm"), {'palette': ['green']}, "OSM")
self.addLayer(gswe.select("hydrolakes"), {'palette': ['purple']}, "Hydrolakes")
legend_dict = {
'ESA': 'ff0000',
'ESRI': 'ffff00',
'JRC': '0000ff',
'OSM': '00ff00',
'Hydrolakes': '800080',
}
self.add_legend(legend_dict=legend_dict, position='bottomleft')
fc = ee.FeatureCollection('users/giswqs/public/countries')
style = {'color': '000000ff', 'width': 1, 'fillColor': '00000000'}
self.addLayer(fc.style(**style), {}, 'Countries', False)
@solara.component
def Page():
with solara.Column(style={"min-width": "500px"}):
Map.element( # type: ignore
zoom=zoom.value,
on_zoom=zoom.set,
center=center.value,
on_center=center.set,
scroll_wheel_zoom=True,
add_google_map=True,
height="800px",
data_ctrl=False,
)
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