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

# In[1]:


import os
import json


us_states = os.path.join("data", "us-states.json")

with open(us_states) as f:
    states = json.load(f)

kw = {"location": [48, -102], "zoom_start": 3}


# In[2]:


import folium
from folium import GeoJson


m = folium.Map(tiles=None, **kw)

GeoJson(states).add_to(m)

m


# In[3]:


import branca

# Create a white image of 4 pixels, and embed it in a url.
white_tile = branca.utilities.image_to_url([[1, 1], [1, 1]])

# Create a map using this url for each tile.
m = folium.Map(tiles=white_tile, attr="white tile", **kw)

GeoJson(states).add_to(m)

m


# In[4]:


images = [[(-1) ** ((i + j) // 30) for i in range(300)] for j in range(300)]

tiles = branca.utilities.image_to_url(images)

m = folium.Map(tiles=tiles, attr="Just because we can", **kw)

GeoJson(states).add_to(m)

m


# In[5]:


images = [[(-1) ** ((i // 30 + j // 30)) for i in range(300)] for j in range(300)]

tiles = branca.utilities.image_to_url(images)

m = folium.Map(tiles=tiles, attr="Just because we can", **kw)

GeoJson(states).add_to(m)

m