CODEWITHSUNDEEP
pythonosmnx
Dlinnard
Dlinnard

Reputation: 13

Plot edges conditional on speed limit in python's OSMnx

I need to plot edges conditional on the speed_kph values such that edges with speed_kph > A are color X and edges with speed_kph < A are color Y. Is this possible in OSMnx?

From: map = ox.graph_from_place('Paradise, California', network_type='drive')

I can plot: ox.plot_graph(map,bgcolor='#FFFFFF',edge_color='#000000',node_color='#000000');

Impute speed and travel time as described in other docs: map_cons_speed = ox.add_edge_speeds(map) map_cons_speed = ox.add_edge_travel_times(map_cons_speed)

Then extract edges: gdf_nodes, gdf_edges = ox.graph_to_gdfs(map_cons_speed)

But I can not figure out how the plot edges conditional on their speed limit.

Does anyone have any ideas? Thank you in advance for your time!

Upvotes: 0

Views: 870

Answers (1)

gboeing
gboeing

Reputation: 6442

Create a list of edge colors based on that attribute:

import osmnx as ox
G = ox.graph_from_place('Paradise, California', network_type='drive')
G = ox.add_edge_speeds(G)
ec = ['y' if d < 50 else 'r' for u, v, d in G.edges(data='speed_kph')]
fig, ax = ox.plot_graph(G, node_alpha=0.1, edge_color=ec)

Or use the plot.get_edge_colors_by_attr function to assign colors from a color map based on attribute values:

import osmnx as ox
G = ox.graph_from_place('Paradise, California', network_type='drive')
G = ox.add_edge_speeds(G)
ec = ox.plot.get_edge_colors_by_attr(G, 'speed_kph', cmap='plasma')
fig, ax = ox.plot_graph(G, node_alpha=0.1, edge_color=ec)

Upvotes: 1

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