"""
US Income by State: Wrapped Facet
---------------------------------
This example shows how to create a map of income in the US by state,
faceted over income brackets 
"""
# category: maps

import altair as alt
from vega_datasets import data

states = alt.topo_feature(data.us_10m.url, 'states')
source = data.income.url

alt.Chart(source).mark_geoshape().encode(
    shape='geo:G',
    color='pct:Q',
    tooltip=['name:N', 'pct:Q'],
    facet='group:N'
).transform_lookup(
    lookup='id',
    from_=alt.LookupData(data=states, key='id'),
    as_='geo'
).properties(
    width=300,
    height=175,
    columns=2
).project(
    type='albersUsa'
)
add geographical facet example