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import ee
import geemap
import solara
zoom = solara.reactive(4)
center = solara.reactive([40, -100])
class Map(geemap.Map):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.add_ee_data()
self.add_layer_manager()
self.add_inspector()
def add_ee_data(self):
# Add Earth Engine dataset
dem = ee.Image('USGS/SRTMGL1_003')
landsat7 = ee.Image('LANDSAT/LE7_TOA_5YEAR/1999_2003').select(
['B1', 'B2', 'B3', 'B4', 'B5', 'B7']
)
states = ee.FeatureCollection("TIGER/2018/States")
# Set visualization parameters.
vis_params = {
'min': 0,
'max': 4000,
'palette': ['006633', 'E5FFCC', '662A00', 'D8D8D8', 'F5F5F5'],
}
# Add Earth Engine layers to Map
self.addLayer(dem, vis_params, 'SRTM DEM', True, 0.5)
self.addLayer(
landsat7,
{'bands': ['B4', 'B3', 'B2'], 'min': 20, 'max': 200, 'gamma': 2.0},
'Landsat 7', False
)
self.addLayer(states, {}, "US States")
@solara.component
def Page():
with solara.Column(style={"min-width": "500px"}):
# solara components support reactive variables
# solara.SliderInt(label="Zoom level", value=zoom, min=1, max=20)
# using 3rd party widget library require wiring up the events manually
# using zoom.value and zoom.set
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="700px"
)
solara.Text(f"Zoom: {zoom.value}")
solara.Text(f"Center: {center.value}")
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