GeoJSON data not displaying in Python folium map

问题

I am trying to display the following geojson file in a folium map in Python but it just shows an empty map with none of the data.

Here are the steps I have tried:

I tried using the python code below but nothing shows up.
I tried other geojson files in the github repository below using the same code and the data show up without any issue, so it looks like my python code is fine
I opened the "census_tracts_2010.geojson" file in github and Mapshaper, the data showed up perfectly without any issue, so it doesn't look like the geojson file is corrupted

Could anyone please let me know how I can fix it?

Geojson file: https://github.com/dwillis/nyc-maps/blob/master/census_tracts_2010.geojson

Python code:

import folium
m = folium.Map(location=[40.66393072,-73.93827499], zoom_start=13)
m.choropleth(geo_path="census_tracts_2010.geojson")
m.save(outfile='datamap.html')

Thanks a lot!

回答1:

That file is not a GeoJson it is a TopoJson. You need to use folium.TopoJson instead.

import folium

m = folium.Map(location=[40.66393072,-73.93827499], zoom_start=13)

folium.TopoJson(
    open('census_tracts_2010.geojson'),
    object_path='objects.nyct2010',
).add_to(m)

m

回答2:

You need to open the geojson file.

    m.choropleth(open("census_tracts_2010.geojson"))

Take a look at the examples https://folium.readthedocs.io/en/latest/quickstart.html

回答3:

Try this: m.add_child(folium.GeoJson(data = open("census_tracts_2010.geojson"))) and then call m.save() fun

来源：https://stackoverflow.com/questions/42107268/geojson-data-not-displaying-in-python-folium-map

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python

geojson

folium