#!/usr/bin/env python
# coding: utf-8

# In[1]:


import os
import folium

print(folium.__version__)


# # Using Leaflet's Smooth Factor Option
# 
# [Polyline](http://leafletjs.com/reference.html#polyline) objects in leaflet are smoothed by default. This removes points from the line, putting less load on the browser when drawing. The level of smoothing [can be specified](http://leafletjs.com/reference.html#polyline-smoothfactor) by passing `smoothFactor` as an option when creating any Polyline object.
# 
# In folium, the level of smoothing can be determined by passing `smooth_factor` as an argument when initialising GeoJson, TopoJson and Choropleth objects. There are no upper or lower bounds to the smoothing level; Leaflet's default is 1.

# In[2]:


m = folium.Map(
    location=[-59.1759, -11.6016],
    tiles='Mapbox Bright',
    zoom_start=2
)


fname = os.path.join('data', 'antarctic_ice_shelf_topo.json')

folium.TopoJson(
    data=open(fname),
    object_path='objects.antarctic_ice_shelf',
    name='default_smoothing',
    smooth_factor=1
).add_to(m)


folium.TopoJson(
    data=open(fname),
    object_path='objects.antarctic_ice_shelf',
    name='default_smoothing',
    smooth_factor=10,
    style_function=lambda x: {'color': '#004c00', 'opacity': '0.7'}
).add_to(m)

folium.LayerControl().add_to(m)

m.save(os.path.join('results', 'SmoothFactor.html'))

m