#!/usr/bin/env python
# coding: utf-8
# ## How does one add a legend (categorical) to a folium map
# ### I have not found easy examples other than the built in contiuous examples tied to idividual layers
# ### Here's an example that I hacked off of the template from Tile Mill
# ### https://tilemill-project.github.io/tilemill/docs/guides/advanced-legends/
# In[1]:
import folium
folium.__version__
# In[2]:
m = folium.Map(location=(30, 20), zoom_start=4)
def style_function(feature):
area = int(feature['properties']['area'])
return {
'fillOpacity': 0.5,
'weight': 0.5,
'fillColor': 'green' if area < 10008018378 \
else 'orange'if area< 20008018378\
else 'red'
}
gjson = folium.GeoJson("https://raw.githubusercontent.com/stefanocudini/leaflet-geojson-selector/master/examples/italy-regions.json",
style_function=style_function
).add_to(m)
m
# ## But how do I add a legend??
# In[3]:
from branca.element import Template, MacroElement
template = """
{% macro html(this, kwargs) %}
jQuery UI Draggable - Default functionality