23 lines
483 B
Python
23 lines
483 B
Python
"""
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Choropleth Map
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==============
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A choropleth map of unemployment rate per county in the US
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"""
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# category: maps
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import altair as alt
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from vega_datasets import data
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counties = alt.topo_feature(data.us_10m.url, 'counties')
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source = data.unemployment.url
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alt.Chart(counties).mark_geoshape().encode(
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color='rate:Q'
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).transform_lookup(
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lookup='id',
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from_=alt.LookupData(source, 'id', ['rate'])
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).project(
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type='albersUsa'
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).properties(
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width=500,
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height=300
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)
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