Folium Map Not Displaying

Running on canopy version 1.5.5.3123 With; Folium Version: 0.1.2, Build: 1 The following code; import folium import pandas as pd LDN_COORDINATES = (51.5074, 0.1278) from IPytho

Solution 1:

_build_map() doesn't exist anymore. The following code worked for me

import folium
from IPython.displayimport display
LDN_COORDINATES = (51.5074, 0.1278)
myMap = folium.Map(location=LDN_COORDINATES, zoom_start=12)
display(myMap)

Solution 2:

You can also save the map as html and then open it with webbrowser.

import folium
import webbrowser


classMap:
    def__init__(self, center, zoom_start):
        self.center = center
        self.zoom_start = zoom_start
    
    defshowMap(self):
        #Create the map
        my_map = folium.Map(location = self.center, zoom_start = self.zoom_start)

        #Display the map
        my_map.save("map.html")
        webbrowser.open("map.html")


#Define coordinates of where we want to center our map
coords = [51.5074, 0.1278]
map = Map(center = coords, zoom_start = 13)
map.showMap()

Solution 3:

Considering the above answers, another simple way is to use it with Jupiter Notebook.

for example (on the Jupiter notebook):

importfoliumlondon_location= [51.507351, -0.127758]

m = folium.Map(location=london_location, zoom_start=15)
m

and see the result when calling the 'm'.

Solution 4:

I've found this tutorial on Folium in iPython Notebooks quite helpful. The raw Folium instance that you've created isn't enough to get iPython to display the map- you need to do a bit more work to get some HTML that iPython can render.

To display in the iPython notebook, you need to generate the html with the myMap._build_map() method, and then wrap it in an iFrame with styling for iPython.

import folium  
from IPython.display import HTML, display
LDN_COORDINATES = (51.5074, 0.1278) 
myMap = folium.Map(location=LDN_COORDINATES, zoom_start=12)
myMap._build_map()
mapWidth, mapHeight = (400,500) # width and height of the displayed iFrame, in pixels
srcdoc = myMap.HTML.replace('"', '"')
embed = HTML('<iframe srcdoc="{}" ''style="width: {}px; height: {}px; display:block; width: 50%; margin: 0 auto; ''border: none"></iframe>'.format(srcdoc, width, height))
embed

Where by returning embed as the output of the iPython cell, iPython will automatically call display.display() on the returned iFrame. In this context, you should only need to call display() if you're rendering something else afterwards or using this in a loop or a function.

Also, note that using map as a variable name may might be confused with the .map() method of several classes.

Solution 5:

Is there a reason you are using an outdated version of Folium?

This ipython notebook clarifies some of the differences between 1.2 and 2, and it explains how to put folium maps in iframes. http://nbviewer.jupyter.org/github/bibmartin/folium/blob/issue288/examples/Popups.ipynb

And the code would look something like this (found in the notebook above, it adds a marker, but one could just take it out):

m = folium.Map([43,-100], zoom_start=4)

html="""
    <h1> This is a big popup</h1><br>
    With a few lines of code...
    <p>
    <code>
        from numpy import *<br>
        exp(-2*pi)
    </code>
    </p>
    """
iframe = folium.element.IFrame(html=html, width=500, height=300)
popup = folium.Popup(iframe, max_width=2650)

folium.Marker([30,-100], popup=popup).add_to(m)

m

The docs are up and running, too, http://folium.readthedocs.io/en/latest/