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import os
import leafmap
import solara
import ipyleaflet
import ipywidgets as widgets
import pandas as pd
import tempfile
event = 'Morocco-Earthquake-Sept-2023'
url = 'https://raw.githubusercontent.com/opengeos/maxar-open-data/master'
repo = 'https://github.com/opengeos/maxar-open-data/blob/master/datasets'
def get_datasets():
datasets = f'{url}/datasets.csv'
df = pd.read_csv(datasets)
return df
def get_catalogs(name):
dataset = f'{url}/datasets/{name}.tsv'
basename = os.path.basename(dataset)
tempdir = tempfile.gettempdir()
tmp_dataset = os.path.join(tempdir, basename)
if os.path.exists(tmp_dataset):
dataset_df = pd.read_csv(tmp_dataset, sep='\t')
else:
dataset_df = pd.read_csv(dataset, sep='\t')
dataset_df.to_csv(tmp_dataset, sep='\t', index=False)
catalog_ids = dataset_df['catalog_id'].unique().tolist()
catalog_ids.sort()
return catalog_ids
def add_widgets(m):
datasets = get_datasets()['dataset'].tolist()
style = {"description_width": "initial"}
padding = "0px 0px 0px 5px"
dataset = widgets.Dropdown(
options=datasets,
description='Event:',
value=event,
style=style,
layout=widgets.Layout(width="270px", padding=padding),
)
image = widgets.Dropdown(
value=None,
options=get_catalogs(dataset.value),
description='Image:',
style=style,
layout=widgets.Layout(width="270px", padding=padding),
)
checkbox = widgets.Checkbox(
value=True,
description='Show footprints',
style=style,
layout=widgets.Layout(width="130px", padding=padding),
)
split = widgets.Checkbox(
value=False,
description='Split map',
style=style,
layout=widgets.Layout(width="130px", padding=padding),
)
def change_dataset(change):
default_geojson = f'{url}/datasets/{change.new}.geojson'
m.layers = m.layers[:2]
m.controls = m.controls[:-1]
m.add_geojson(default_geojson, layer_name='Footprint', zoom_to_layer=True)
image.options = get_catalogs(change.new)
dataset.observe(change_dataset, names='value')
def change_image(change):
if change.new:
mosaic = f'{url}/datasets/{dataset.value}/{image.value}.json'
m.add_stac_layer(mosaic, name=image.value)
image.observe(change_image, names='value')
def change_footprint(change):
geojson_layer = m.find_layer('Footprint')
if change.new:
geojson_layer.visible = True
else:
geojson_layer.visible = False
checkbox.observe(change_footprint, names='value')
def change_split(change):
if change.new:
if image.value is not None:
left_layer = m.find_layer(image.value)
right_layer = m.find_layer('Google Satellite')
right_layer.visible = True
footprint_layer = m.find_layer('Footprint')
footprint_layer.visible = False
m.split_map(
left_layer=left_layer,
right_layer=right_layer,
add_close_button=True,
)
split.value = False
else:
left_layer = None
split.observe(change_split, names='value')
event_control = ipyleaflet.WidgetControl(widget=dataset, position='topright')
image_control = ipyleaflet.WidgetControl(widget=image, position='topright')
checkboxes = widgets.HBox([checkbox, split])
checkbox_control = ipyleaflet.WidgetControl(widget=checkboxes, position='topright')
m.add(event_control)
m.add(image_control)
m.add(checkbox_control)
zoom = solara.reactive(2)
center = solara.reactive((20, 0))
class Map(leafmap.Map):
def __init__(self, **kwargs):
kwargs['toolbar_control'] = False
super().__init__(**kwargs)
basemap = {
"url": "https://mt1.google.com/vt/lyrs=s&x={x}&y={y}&z={z}",
"attribution": "Google",
"name": "Google Satellite",
}
self.add_tile_layer(**basemap, shown=False)
self.add_layer_manager(opened=False)
add_widgets(self)
default_geojson = f'{url}/datasets/{event}_union.geojson'
basename = os.path.basename(default_geojson)
tempdir = tempfile.gettempdir()
tmp_geojson = os.path.join(tempdir, basename)
if os.path.exists(tmp_geojson):
default_geojson = tmp_geojson
else:
leafmap.download_file(default_geojson, tmp_geojson, quiet=True)
self.add_geojson(default_geojson, layer_name='Footprint', zoom_to_layer=True)
@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,
toolbar_ctrl=False,
data_ctrl=False,
height="780px",
)
solara.Text(f"Center: {center.value}")
solara.Text(f"Zoom: {zoom.value}")
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