GeoPandas supports geocoding (i.e., converting place names to location on Earth) through geopy, an optional dependency of GeoPandas. The following example shows how to get the locations of boroughs in New York City, and plots those locations along with the detailed borough boundary file included within GeoPandas.
In [1]: import geodatasets
In [2]: boros = geopandas.read_file(geodatasets.get_path("nybb"))
In [3]: boros.BoroName
Out[3]:
0 Staten Island
1 Queens
2 Brooklyn
3 Manhattan
4 Bronx
Name: BoroName, dtype: object
In [4]: boro_locations = geopandas.tools.geocode(boros.BoroName)
In [5]: boro_locations
Out[5]:
geometry address
0 POINT (-74.1496048 40.5834557) Staten Island, New York, New York, United States
1 POINT (-73.8283132 40.7135078) Queens, New York, New York, United States
2 POINT (-73.9497211 40.6526006) Brooklyn, New York, New York, United States
3 POINT (-73.9598939 40.7896239) Manhattan, New York, New York, United States
4 POINT (-73.8785937 40.8466508) The Bronx, New York, New York, United States
In [6]: import matplotlib.pyplot as plt
In [7]: fig, ax = plt.subplots()
In [8]: boros.to_crs("EPSG:4326").plot(ax=ax, color="white", edgecolor="black");
In [9]: boro_locations.plot(ax=ax, color="red");
By default, the geocode() function uses the Photon geocoding API. But a different geocoding service can be specified with the provider keyword.
The argument to provider can either be a string referencing geocoding services, such as 'google', 'bing', 'yahoo', and 'openmapquest', or an instance of a Geocoder from geopy. See geopy.geocoders.SERVICE_TO_GEOCODER for the full list. For many providers, parameters such as API keys need to be passed as **kwargs in the geocode() call.
For example, to use the OpenStreetMap Nominatim geocoder, you need to specify a user agent:
geopandas.tools.geocode(boros.BoroName, provider='nominatim', user_agent="my-application")
Attention
Please consult the Terms of Service for the chosen provider. The example above uses 'photon' (the default), which expects fair usage - extensive usage will be throttled. (Photon’s Terms of Use).
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