Choropleth Layer

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

Example

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 allowed 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