# Load the county boundary coordinates
from urllib.request import urlopen
import json
with urlopen('https://raw.githubusercontent.com/plotly/datasets/master/geojson-counties-fips.json') as response:
counties = json.load(response)
# Build the choropleth
import plotly.express as px
fig = px.choropleth(df,
geojson=counties,
locations='fips',
color='unemp',
color_continuous_scale="Viridis",
range_color=(0, 12),
scope="usa",
labels={'unemp':'unemployment rate'}
)
fig.update_layout(margin={"r":0,"t":0,"l":0,"b":0})
# Improve the legend
fig.update_layout(coloraxis_colorbar=dict(
thicknessmode="pixels", thickness=10,
lenmode="pixels", len=150,
yanchor="top", y=0.8,
ticks="outside", ticksuffix=" %",
dtick=5
))
fig.show()
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