Subsetting data by cookie cutting down to a geofabric catchment¶

import ipyleaflet as ipyl
import ipywidgets as ipyw
import json

# geojson layer with hover handler
with open('../../silvereye/app/public/data/geofabric_ahgf_catchments_level2.json.geojson') as f:
    data = json.load(f)
    

for feature in data['features']:
    feature['properties']['style'] = {
        'color': 'grey',
        'weight': 1,
        'fillColor': 'grey',
        'fillOpacity': 0.4
    }
    

layer = ipyl.GeoJSON(data=data, hover_style={'fillColor': 'yellow'})

# Map and label widgets
map = ipyl.Map(center=[-30, 130], zoom=5)
map.layout.height = '800px'
label = ipyw.Label(layout=ipyw.Layout(width='100%'))

def hover_handler(event=None, id=None, properties=None):
    label.value = properties['level2name']
    
def click_handler(event=None, id=None, properties=None):
    label.value = properties['level2name']

layer.on_hover(hover_handler)

#layer.on_click(click_handler)

map.add_layer(layer)

ipyw.VBox([label, map])