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Martin Fleischmann
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* use pydata theme * structure * fix links * adapt colors * getting started * buttons * buttons * rename, use myst, fill stuff * myst to env * cleanup * covered_by * review comments * fix link * use api
60 lines
2.0 KiB
ReStructuredText
60 lines
2.0 KiB
ReStructuredText
.. currentmodule:: geopandas
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.. ipython:: python
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:suppress:
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import geopandas
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Geocoding
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==========
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``geopandas`` supports geocoding (i.e., converting place names to
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location on Earth) through `geopy`_, an optional dependency of ``geopandas``.
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The following example shows how to get the
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locations of boroughs in New York City, and plots those locations along
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with the detailed borough boundary file included within ``geopandas``.
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.. _geopy: http://geopy.readthedocs.io/
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.. ipython:: python
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boros = geopandas.read_file(geopandas.datasets.get_path("nybb"))
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boros.BoroName
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boro_locations = geopandas.tools.geocode(boros.BoroName)
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boro_locations
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import matplotlib.pyplot as plt
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fig, ax = plt.subplots()
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boros.to_crs("EPSG:4326").plot(ax=ax, color="white", edgecolor="black");
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@savefig boro_centers_over_bounds.png
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boro_locations.plot(ax=ax, color="red");
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By default, the ``geocode`` function uses the
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`GeoCode.Farm geocoding API <https://geocode.farm/>`__ with a rate limitation
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applied. But a different geocoding service can be specified with the
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``provider`` keyword.
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The argument to ``provider`` can either be a string referencing geocoding
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services, such as ``'google'``, ``'bing'``, ``'yahoo'``, and
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``'openmapquest'``, or an instance of a ``Geocoder`` from ``geopy``. See
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``geopy.geocoders.SERVICE_TO_GEOCODER`` for the full list.
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For many providers, parameters such as API keys need to be passed as
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``**kwargs`` in the ``geocode`` call.
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For example, to use the OpenStreetMap Nominatim geocoder, you need to specify
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a user agent:
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.. code-block:: python
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geopandas.tools.geocode(boros.BoroName, provider='nominatim', user_agent="my-application")
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.. attention::
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Please consult the Terms of Service for the chosen provider. The example
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above uses ``'geocodefarm'`` (the default), for which free users are
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limited to 250 calls per day and 4 requests per second
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(`geocodefarm ToS <https://geocode.farm/geocoding/free-api-documentation/>`_).
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