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I know that x/y-axis are flipped (Berlin is south-east of Hamburg), but do I need to fix this manually or can matplotlib/networkx do this for me? And if that needs to be done manually, is there a best way to do it?

import networkx as nx

G = nx.Graph()

G.add_node('Hamburg', pos=(53.5672, 10.0285))
G.add_node('Berlin', pos=(52.51704, 13.38792))

nx.draw(G, nx.get_node_attributes(G, 'pos'), with_labels=True, node_size=0)

enter image description here

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  • 4
    I think your deeper issue is that you're treating latitude as "x" and longitude as "y". Instead, <x,y> is <long,lat>. Inverting the x and y axes won't change that. Instead, you'll need to plot long, lat instead of lat, long. Commented Sep 9, 2015 at 21:44
  • For the general case, use the pos argument in nx.draw, see Plot NetworkX Graph with coordinates Commented Jul 21, 2020 at 9:48

2 Answers 2

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you can invert the positions before plotting.

pos = {city:(long, lat) for (city, (lat,long)) in nx.get_node_attributes(G, 'pos').items()}
nx.draw(G, pos, with_labels=True, node_size=0)

What the command does is it takes the dictionary nx.get_node_attributes('pos') and finds all the items. An item looks like (city, (lat, long)), so it reads in each item in that format and then creates an entry in the new dictionary pos so that pos[city]=(long,lat).

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3

You can use 

from matplotlib import pyplot

pyplot.gca().invert_yaxis()
pyplot.gca().invert_xaxis()
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Okay, that is brilliant, because now I know that lat/lon had to be flipped. Thanks!

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