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[BUG]: Odd polygon in land layer, extending into Canada on US choropleth #5685
Description
Description
There is an odd band extending from the northwest US into Canada when making a US choropleth. You can see this in the official documentation. I think this stems from the GeoJSON file included in Plotly. The file is very out of date, by the way, with changes to Oglala Lakota County in South Dakota and the Kusilvak Census Area in Alaska not being represented.
I can hide this band in the Python version using visible=False when calling update_geos().
Screenshots/Video
Steps to reproduce
- Create a new Python file
- Paste in the unemployment example from https://plotly.com/python/choropleth-maps/
- Run the python file
Notes
The unemployment example is here for completeness' sake:
from urllib.request import urlopen
import json
with urlopen('https://github.com/raw/plotly/datasets/master/geojson-counties-fips.json') as response:
counties = json.load(response)
import pandas as pd
df = pd.read_csv("https://github.com/raw/plotly/datasets/master/fips-unemp-16.csv",
dtype={"fips": str})
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})
fig.show()
Activity
camdecoster commentedon Jul 30, 2026
Thanks for the report! This does seem like a bug. We'll take a look as we have time. If you'd like to dig into it, we can prioritize a PR review. FYI, a change would likely need to be made in plotly.js to fix this but maybe you'll find otherwise.