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When px.choropleth() is called with a GeoJSON feature collection containing multiple features matching a single featureidkey value, only the first feature is rendered. I believe all features should be so rendered.
The following code generates two images: the first renders all four features, while the second renders only three. The first uses a featureidkey unique to all features, the second uses a featureidkey that is not unique -- only the first feature to match is rendered. :-(
#!/usr/bin/env python3importpandasaspdimportplotly.expressaspx# A simple GeoJSON with four features. # Each feature has a district. # One district has two features.geojson= {
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"properties": {
"name": "Alpha",
"district": "One",
},
"geometry": {
"type": "Polygon",
"coordinates": [[[0, 0], [0, 5], [5, 5], [5, 0], [0, 0]]],
},
},
{
"type": "Feature",
"properties": {
"name": "Bravo",
"district": "One",
},
"geometry": {
"type": "Polygon",
"coordinates": [[[5, 0], [5, 5], [10, 5], [10, 0], [5, 0]]],
},
},
{
"type": "Feature",
"properties": {
"name": "Charlie",
"district": "Two",
},
"geometry": {
"type": "Polygon",
"coordinates": [[[0, 5], [0, 10], [5, 10], [5, 5], [0, 5]]],
},
},
{
"type": "Feature",
"properties": {
"name": "Delta",
"district": "Three",
},
"geometry": {
"type": "Polygon",
"coordinates": [[[5, 5], [5, 10], [10, 10], [10, 5], [5, 5]]],
},
},
],
}
districts= {
f["properties"]["name"]: f["properties"]["district"] forfingeojson["features"]
}
# A simple dataframe relating names and districts from the above GeoJSON data.# i.e., [{'name': 'Alpha', 'district': 'One'}, ...]data= [f['properties'] forfingeojson['features']]
df=pd.DataFrame(data)
# This code generates two maps from the data:# * The name map shows all four squares in the same color (count = 1)# * The district map shows _three_ squares, one with one color (count = 2) and two with another color (count = 1)# What I expected:# * The district map should show all four squares, two with light color and two with darkforkeyin ["name", "district"]:
region_counts=df.groupby([key], observed=False).size().reset_index(name="count")
fig=px.choropleth(
region_counts,
geojson=geojson,
fitbounds='geojson',
locations=key,
color="count",
featureidkey=f"properties.{key}",
)
fig.write_image(f"mwe-{key}.png")
The text was updated successfully, but these errors were encountered:
When px.choropleth() is called with a GeoJSON feature collection containing multiple features matching a single featureidkey value, only the first feature is rendered. I believe all features should be so rendered.
The following code generates two images: the first renders all four features, while the second renders only three. The first uses a featureidkey unique to all features, the second uses a featureidkey that is not unique -- only the first feature to match is rendered. :-(
The text was updated successfully, but these errors were encountered: