fix geopandas examples

Author: nicolaskruchten

doc/python/choropleth-maps.md

@@ -6,7 +6,7 @@ jupyter:
       extension: .md
       format_name: markdown
       format_version: '1.2'
-      jupytext_version: 1.6.0
+      jupytext_version: 1.4.2
   kernelspec:
     display_name: Python 3
     language: python
@@ -20,7 +20,7 @@ jupyter:
     name: python
     nbconvert_exporter: python
     pygments_lexer: ipython3
-    version: 3.7.6
+    version: 3.7.7
   plotly:
     description: How to make choropleth maps in Python with Plotly.
     display_as: maps
@@ -184,13 +184,16 @@ fig.show()
 import plotly.express as px
 import geopandas as gpd
 
-geo_df = gpd.read_file(gpd.datasets.get_path('nybb')).to_crs("EPSG:4326")
+df = px.data.election()
+geo_df = gpd.GeoDataFrame.from_features(
+    px.data.election_geojson()["features"]
+).merge(df, on="district").set_index("district")
 
 fig = px.choropleth(geo_df,
                    geojson=geo_df.geometry,
                    locations=geo_df.index,
-                   color='Shape_Leng',
-                   hover_name="BoroName")
+                   color="Joly",
+                   projection="mercator")
 fig.update_geos(fitbounds="locations", visible=False)
 fig.show()
 ```

doc/python/mapbox-county-choropleth.md

@@ -165,16 +165,18 @@ fig.show()
 import plotly.express as px
 import geopandas as gpd
 
-geo_df = gpd.read_file(gpd.datasets.get_path('nybb')).to_crs("EPSG:4326")
+df = px.data.election()
+geo_df = gpd.GeoDataFrame.from_features(
+    px.data.election_geojson()["features"]
+).merge(df, on="district").set_index("district")
 
 fig = px.choropleth_mapbox(geo_df,
                            geojson=geo_df.geometry,
                            locations=geo_df.index,
-                           color='Shape_Leng',
-                           hover_name="BoroName",
-                           center={"lat": 40.71, "lon": -74.00},
+                           color="Joly",
+                           center={"lat": 45.5517, "lon": -73.7073},
                            mapbox_style="open-street-map",
-                           zoom=8)
+                           zoom=8.5)
 fig.show()
 ```