How to plotted a choropleth using correctly featureidkey ?

Question

CODE:

geoURL="https://data.humdata.org/dataset/e66dbc70-17fe-4230-b9d6-855d192fc05c/resource/6fa37b41-ad28-40a6-9641-3b4efd4dbe13/download/ecuador.geojson"

with urlopen(geoURL) as response:
geoProvinces = json.load(response)

df_new = ecuador.rename(columns={'Provinces': 'DPA_DESPRO'})

fig = px.choropleth_mapbox(df_new,
geojson=geoProvinces,
color=df_new['Confirmed deaths'],
locations=df_new['DPA_DESPRO'], #featureidkey='properties.DPA_DESPRO',
center={"lat": -2, "lon": -80},
mapbox_style="carto-positron",
zoom=9 )
fig.update_layout(margin={"r":0,"t":0,"l":0,"b":0})
fig.show()

fig = px.choropleth_mapbox(df_new,
geojson=geoProvinces,
color=df_new['Confirmed deaths'],
locations=df_new['DPA_DESPRO'],
center={"lat": -2, "lon": -80},
mapbox_style="carto-positron",
zoom=9 )
fig.update_layout(margin={"r":0,"t":0,"l":0,"b":0})
fig.show()

There is a missing parameter which is #featureidkey, I tried with featureidkey='properties.DPA_DESPRO' , but the choroplet maps is plotting the areas of each provinces and this gives me the followin error:

TypeError: choropleth_mapbox() got an unexpected keyword argument 'featureidkey'

I am folloing this link: https://plotly.com/JUMP_LINK__&&__python__&&__JUMP_LINK/choropleth-maps/

Please help me.

Answer 1

First update and install geopandas:

!conda install -c conda-forge geopandas
!pip install git+git://github.com/geopandas/geopandas.git

import plotly.express as px # To plot choroplet maps
import geopandas as gpd

fig = px.choropleth(ecuador,
geojson=geojson_ec,
locations=ecuador['Provinces'],
color_continuous_scale="OrRd",
title="Covid cases in Ecuador",
featureidkey="properties.dpa_despro",
color=ecuador['Confirmed cases'],
hover_name=ecuador['Provinces'],
labels="properties.dpa_despro",
scope='world',
projection='natural earth'
)
fig.update_geos( fitbounds="locations", visible=False)
fig.update_layout(margin={"r":0,"t":0,"l":0,"b":0})
fig.add_parcoords()
fig.show()

Answer 2

First, the error says
"TypeError: choropleth_mapbox() got an unexpected keyword argument 'featureidkey'", so you can't use featureidkey to plot the map.
However, if you pay attention to the geojson structure of the first example at
https://plotly.com/JUMP_LINK__&&__python__&&__JUMP_LINK/choropleth-maps/
you will see the json has 4 keys [type, properties, geometry, id] for each list element, meanwhile, in your ecuadorian geojson you will find only 3 keys [type,properties,geometry].

That being said, the solution is to add a fourth key "id" to your geojson, for every element in the list, and then run the code as is in the plotly example, then you will have no error.