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Choropleth Layer

Choropleth is an here-map-widget-for-jupyter class that allows you to generate a Choropleth Map for your data.

Example

.. jupyter-execute::

    import here_map_widget
    import json
    import pandas as pd
    import os
    import requests
    from branca.colormap import linear


    def load_data(url, filename, file_type):
        r = requests.get(url)
        with open(filename, "w") as f:
            f.write(r.content.decode("utf-8"))
        with open(filename, "r") as f:
            return file_type(f)


    geo_json_data = load_data(
        "https://raw.githubusercontent.com/"
        + "jupyter-widgets/ipyleaflet/master/examples/us-states.json",
        "us-states.json",
        json.load,
    )

    unemployment = load_data(
        "https://raw.githubusercontent.com/"
        + "jupyter-widgets/ipyleaflet/master/examples/US_Unemployment_Oct2012.csv",
        "US_Unemployment_Oct2012.csv",
        pd.read_csv,
    )

    unemployment = dict(
        zip(unemployment["State"].tolist(), unemployment["Unemployment"].tolist())
    )

    layer = here_map_widget.Choropleth(
        geo_data=geo_json_data,
        choro_data=unemployment,
        colormap=linear.YlOrRd_04,
    )

    m = here_map_widget.Map(api_key=os.environ["LS_API_KEY"], center=[43, -100], zoom=4)
    m.add_layer(layer)
    m

Attributes

Attribute Type Doc
geo_data dict The GeoJSON structure on which to apply the Choropleth effect
choro_data dict Data used for building the Choropleth effect
value_min float Minimum data value for the color mapping
value_max float Maximum data value for the color mapping
colormap branca.colormap.ColorMap The colormap used for the effect
key_on string The feature key to use for the colormap effect, default value is id.
style dict The style to use for rendering GeoJSON data, please check possible values for styles here
disable_legacy_mode boolean Disable legacy mode for parsing GeoJSON data default True
style dict The style to use for rendering GeoJSON data
hover_style dict The style to use for rendering data when hovered over
evt_type string Event type to be used to apply hover_style, please check :ref:`allowed values <misc_values>`, default value is tap.
show_bubble boolean To determine whether to show info bubble for space data or not
style_callback Callable object A callback function which is called for each feature to generate style for the feature
point_style dict The style to use for rendering Points in GeoJSON if not provided default Markers will be used. please check possible values for styles here